8184800: Streamline RTM flag validity testing with generic flag testing support.

[Lindenmaier, Goetz]

Hi,

please review this change. I please need a sponsor.
http://cr.openjdk.java.net/~goetz/wr17/8184800-rtmFlags/webrev.01/

RTM was implemented before specifying ranges for flags was established
in openJdk. It has custom checks implemented per platform in
vm_version_<cpu>.cpp as well as tests for these checks in compiler/rtm/cli.

8180612 added ranges for a row of RTM flags. Tests for RTMAbortRatio
and RTMTotalCountIncrRate now fail, because the range check failure
message is different.

This change removes the custom checks, implements a generic method
RTMTotalCountIncrRateConstraintFunc() and updates the tests. Some
tests are now superfluous as the ranges will be tested by
TestOptionsWithRanges.

I tested on x86/ppc machines with and without RTM support, as well
as on the other platforms we test automated.

Best regards,
  Goetz.
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