8174749: Use hash table/oops for MemberName table
Summary: Add a Java type called ResolvedMethodName which is immutable and can be stored in a hashtable, that is weakly collected by gc
Reviewed-by: sspitsyn, stefank, jrose

8174879: Rename jdk.vm.ci to jdk.internal.vm.ci
Summary: Rename jdk.vm.ci and jdk.vm.compiler modules to jdk.internal.vm.ci and jdk.internal.vm.compiler.
Reviewed-by: mchung, ihse, dnsimon