Partialy implement validation for `valid` key

[Mingun]

This PR adds missing validation for valid keys. Some problems not solved, because I do not know what is the prefered way for you to solve them. Namely:

• some expected error messages was written with some other check method in mind, namely TypeDetector.assertCompareTypes. Actually the other methods are used which produces another messages. Sometimes this produces false-positives, I guess
• some tests produces additional errors, the expected messages should be updated accordingly

Below the changed parts in the output (this is how errors looks after this PR).

Fixed (5):

[info] - attr_bad_valid_expr *** FAILED ***
[info]   []
[info]     did not equal
[info]   [attr_bad_valid_expr.ksy: /seq/0/valid/expr:
[info]          error: invalid type: expected boolean, got Int1Type(true)
[info]   ] (SimpleMatchers.scala:34)
[info] - expr_field_unknown_valid_eq_long *** FAILED ***
[info]   []
[info]     did not equal
[info]   [expr_field_unknown_valid_eq_long.ksy: /seq/0/valid/eq:
[info]          error: unable to access 'bar' in expr_field_unknown_valid_eq_long context
[info]   ] (SimpleMatchers.scala:34)
[info] - expr_field_unknown_valid_expr *** FAILED ***
[info]   []
[info]     did not equal
[info]   [expr_field_unknown_valid_expr.ksy: /seq/0/valid/expr:
[info]          error: unable to access 'bar' in expr_field_unknown_valid_expr context
[info]   ] (SimpleMatchers.scala:34)
[info] - expr_field_unknown_valid_range *** FAILED ***
[info]   []
[info]     did not equal
[info]   [expr_field_unknown_valid_range.ksy: /seq/0/valid/min:
[info]          error: unable to access 'bar' in expr_field_unknown_valid_range context
[info]
[info]   expr_field_unknown_valid_range.ksy: /seq/0/valid/max:
[info]          error: unable to access 'qux' in expr_field_unknown_valid_range context
[info]   ] (SimpleMatchers.scala:34)
[info] - expr_field_unknown_valid_eq_short *** FAILED ***
[info]   []
[info]     did not equal
[info]   [expr_field_unknown_valid_eq_short.ksy: /seq/0/valid:
[info]          error: unable to access 'bar' in expr_field_unknown_valid_eq_short context
[info]   ] (SimpleMatchers.scala:34)

Changed error message (6, expected must be corrected or false-positives):

[info] - attr_bad_valid_repeat_eq_short *** FAILED ***
[info]   [attr_bad_valid_repeat_eq_short.ksy: /seq/0/valid:
[info]          error: invalid type: expected IntMultiType(true,Width4,Some(LittleEndian)), got ArrayTypeInStream(CalcIntType)
[info]   ]
[info]     did not equal
[info]   [attr_bad_valid_repeat_eq_short.ksy: /seq/0/valid:
[info]          error: can't compare IntMultiType(true,Width4,Some(LittleEndian)) and ArrayTypeInStream(CalcIntType)
[info]   ] (SimpleMatchers.scala:34)
[info] - attr_bad_valid_eq_short *** FAILED ***
[info]   [attr_bad_valid_eq_short.ksy: /seq/0/valid:
[info]          error: invalid type: expected Int1Type(false), got CalcStrType
[info]   ]
[info]     did not equal
[info]   [attr_bad_valid_eq_short.ksy: /seq/0/valid:
[info]          error: can't compare Int1Type(false) and CalcStrType
[info]   ] (SimpleMatchers.scala:34)
[info] - attr_bad_valid_eq_long *** FAILED ***
[info]   [attr_bad_valid_eq_long.ksy: /seq/0/valid/eq:
[info]          error: invalid type: expected Int1Type(false), got CalcStrType
[info]   ]
[info]     did not equal
[info]   [attr_bad_valid_eq_long.ksy: /seq/0/valid/eq:
[info]          error: can't compare Int1Type(false) and CalcStrType
[info]   ] (SimpleMatchers.scala:34)
[info] - attr_bad_valid_any_of *** FAILED ***
[info]   [attr_bad_valid_any_of.ksy: /seq/0/valid/any-of/0:
[info]          error: invalid type: expected Int1Type(false), got Int1Type(true)
[info]
[info]   attr_bad_valid_any_of.ksy: /seq/0/valid/any-of/1:
[info]          error: invalid type: expected Int1Type(false), got Int1Type(true)
[info]
[info]   attr_bad_valid_any_of.ksy: /seq/0/valid/any-of/2:
[info]          error: invalid type: expected Int1Type(false), got CalcBooleanType
[info]
[info]   attr_bad_valid_any_of.ksy: /seq/0/valid/any-of/3:
[info]          error: invalid type: expected Int1Type(false), got Int1Type(true)
[info]   ]
[info]     did not equal
[info]   [attr_bad_valid_any_of.ksy: /seq/0/valid/any-of/2:
[info]          error: can't compare Int1Type(false) and CalcBooleanType
[info]   ] (SimpleMatchers.scala:34)
[info] - attr_bad_valid_range *** FAILED ***
[info]   [attr_bad_valid_range.ksy: /seq/0/valid/min:
[info]          error: invalid type: expected Int1Type(false), got CalcBooleanType
[info]
[info]   attr_bad_valid_range.ksy: /seq/0/valid/max:
[info]          error: invalid type: expected Int1Type(false), got CalcStrType
[info]   ]
[info]     did not equal
[info]   [attr_bad_valid_range.ksy: /seq/0/valid/min:
[info]          error: can't compare Int1Type(false) and CalcBooleanType
[info]
[info]   attr_bad_valid_range.ksy: /seq/0/valid/max:
[info]          error: can't compare Int1Type(false) and CalcStrType
[info]   ] (SimpleMatchers.scala:34)
[info] - expr_field_unknown_valid_any_of *** FAILED ***
[info]   [expr_field_unknown_valid_any_of.ksy: /seq/0/valid/any-of/0:
[info]          error: invalid type: expected Int1Type(false), got Int1Type(true)
[info]
[info]   expr_field_unknown_valid_any_of.ksy: /seq/0/valid/any-of/1:
[info]          error: unable to access 'bar' in expr_field_unknown_valid_any_of context
[info]
[info]   expr_field_unknown_valid_any_of.ksy: /seq/0/valid/any-of/2:
[info]          error: invalid type: expected Int1Type(false), got Int1Type(true)
[info]
[info]   expr_field_unknown_valid_any_of.ksy: /seq/0/valid/any-of/3:
[info]          error: unable to access 'qux' in expr_field_unknown_valid_any_of context
[info]   ]
[info]     did not equal
[info]   [expr_field_unknown_valid_any_of.ksy: /seq/0/valid/any-of/1:
[info]          error: unable to access 'bar' in expr_field_unknown_valid_any_of context
[info]
[info]   expr_field_unknown_valid_any_of.ksy: /seq/0/valid/any-of/3:
[info]          error: unable to access 'qux' in expr_field_unknown_valid_any_of context
[info]   ] (SimpleMatchers.scala:34)