Support class field rename in SerializerPojo

[jankotek]

Support class field rename in SerializerPojo.

• add ElsaMaker.registerClassFieldRename() to register alias
• handle matrix:
  • class catalog in binary data contains (old/new) field name
  • existing class has (old/new) field
• handle getXXX() getter in deserialization as alias for non-existing renamed field
• handle setXXX() setter in serialization as alias for non-existing renamed field