RFR (XXS): 8140453: compiler control test failed with RuntimeException: CompileCommand: nonexistent missing

[Pavel Punegov]

Please review the following small fix for tests.

Output processor incorrectly checks for validity only method pattern 
instead of full command.
Also small refactoring done: inlined local variables.

bug: https://bugs.openjdk.java.net/browse/JDK-8140453
webrev: http://cr.openjdk.java.net/~ppunegov/8140453/webrev.00/

-- 
Thanks,
Pavel Punegov