8213323: sa/TestJmapCoreMetaspace.java and sa/TestJmapCore.java fail with ZGC Summary: Avoid creating the hprof file and throw an exception in HeapHprofBinWriter for ZGC and handle this in the TestJmap* testcases Reviewed-by: gadams, jcbeyler, cjplummer

8214502: Add space after/before {} in remaining vmTestbase tests Summary: Added spaces around the {} Reviewed-by: dholmes, sspitsyn