8157453: Convert DependencyContext_test to GTest
Reviewed-by: dholmes, rehn, kzhaldyb

7177745: JSR292: Many Callsite relinkages cause target method to always run in interpreter mode
Reviewed-by: jrose, kvn

8143408: Crash during InstanceKlass unloading when clearing dependency context
Reviewed-by: kvn

8139595: MethodHandles::remove_dependent_nmethod is not MT safe
Reviewed-by: jrose, coleenp