8055657: Test compiler/classUnloading/methodUnloading/TestMethodUnloading.java does not work with non-default GC
Summary: Remove the '-XX:+UseParallelGC' parameter from the test because it is conflicting with other GC settings.
Reviewed-by: kvn

Summary: Because anonymous classes are not in the system dictionary, we have to set 'unloading_occurred' based on 'CLDG::do_unloading()'. Added jtreg test.
Reviewed-by: kvn, coleenp

8029443: 'assert(klass->is_loader_alive(_is_alive)) failed: must be alive' during VM_CollectForMetadataAllocation
Summary: Added missing metadata relocation to 'loadConP_no_oop_cheap' on Sparc if the pointer is referring to a Klass. Added jtreg test.
Reviewed-by: kvn