8164133: Tests gc/arguments/TestAlignmentToUseLargePages.java and gc/cms/TestBubbleUpRef.java use too small heap
Reviewed-by: jmasa, sangheki, kzhaldyb

8160088: update hotspot tests depending on GC to use @requires vm.gc.X
Reviewed-by: iignatyev, mchernov, dholmes

8147003: Move BubbleUpRef test into CMS directory
Summary: closed test gc/4950157/BubbleUpRef.java moved to gc/cms/TestBubbleUpRef.java
Reviewed-by: jwilhelm, brutisso