Request for review for JDK-8178507 - co-locate nsk.regression.gc tests

[Alexander Harlap]

Please review change for JDK-8178507 
<https://bugs.openjdk.java.net/browse/JDK-8178507> - co-locate 
nsk.regression.gc tests

JDK-8178507 <https://bugs.openjdk.java.net/browse/JDK-8178507> is last 
remaining sub-task ofJDK-8178482 
<https://bugs.openjdk.java.net/browse/JDK-8178482> - Co-locate remaining 
GC tests


Proposed change located at 
http://cr.openjdk.java.net/~aharlap/8178507/webrev.00/

Co-located and converted to JTREG tests are:

     nsk/regression/b4187687 => hotspot/test/gc/TestFullGCALot.java

     nsk/regression/b4396719 => hotspot/test/gc/TestStackOverflow.java

     nsk/regression/b4668531 => 
hotspot/test/gc/TestMemoryInitialization.java

     nsk/regression/b6186200 => hotspot/test/gc/cslocker/TestCSLocker.java


Thank you,

Alex