RFR (XXS): 8076274 - [TESTBUG] Remove @ignore from runtime\NMT\JcmdDetailDiff.java

[George Triantafillou]

Please review this very small fix for JDK-8076274:

JBS: https://bugs.openjdk.java.net/browse/JDK-8076274
webrev: http://cr.openjdk.java.net/~gtriantafill/8076274/webrev.00/ 
<http://cr.openjdk.java.net/%7Egtriantafill/8076274/webrev.00/>

The @ignore tag was removed to enable the test.

The fix was tested locally on Linux with jtreg and on all platforms with 
the JPRT hotspot testset.

Thanks.

-George