RFR(S): 8180184: Add DATA and FSIZE to os::Posix::print_rlimit_info

[Mikael Vidstedt]

Please review the following fix which adds RLIMIT_DATA and RLIMIT_FISZE to the rlimit related data in the crash dump, and cleans up/unifies some of the related code.

Bug: https://bugs.openjdk.java.net/browse/JDK-8180184 <https://bugs.openjdk.java.net/browse/JDK-8180184>
Webrev: http://cr.openjdk.java.net/~mikael/webrevs/8180184/webrev.00/hotspot/webrev/ <http://cr.openjdk.java.net/~mikael/webrevs/8180184/webrev.00/hotspot/webrev/>

Tested using JPRT. Manually verified that the crash dump contains the expected information.

Thanks to Thomas for helping verify that the change works as expected on AIX as well!

Cheers,
Mikael

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