added support for operf if present, and if CMD_OPCONTROL is not set

[fipar]

This branch updates --collect-oprofile so that it works with oprofile >= 1.0.0 (in which opcontrol is deprecated, as noted by Valeriy here: http://mysqlentomologist.blogspot.com/2017/01/oprofile-basics-for-mysql-profiling.html).

[vadimtk]

Fernando,

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[fipar]

Vadim,

I have signed the CLA. Regards,