[RFR] 8016752: Test case for 8005857/8016740 (assert in GC_locker from PSOldGen::expand with -XX:+PrintGCDetails and Verbose)

[Andrey Zakharov]

Hi, team.
Here is simple test for JVM don't crash when its with PSOldGen, low 
memory and with -XX:+PrintGCDetails and -XX:+Verbose flags 
(https://bugs.openjdk.java.net/browse/JDK-8016740) based on Crasher 
attached to original incident bug

webrev:
http://cr.openjdk.java.net/~azakharov/8016752/webrev/

test bug:
https://bugs.openjdk.java.net/browse/JDK-8016752

bug:
https://bugs.openjdk.java.net/browse/JDK-8016740
https://bugs.openjdk.java.net/browse/JDK-8005857

Thanks.