RFR(S) 8234622 [TESTBUG] ArchivedModuleCompareTest.java fails with -vmoptions:-Xlog:cds

[Ioi Lam]

https://bugs.openjdk.java.net/browse/JDK-8234622
http://cr.openjdk.java.net/~iklam/jdk14/8234622-ArchivedModuleCompareTest-failed-with-logging.v01/

This test is confused when it encounters UL logging messages in the 
STDOUT of child processes. The fix is to filter out the UL logs using 
Regexp.

Thanks
- Ioi