Debugger: Merge RValueReference{Gdb,Lldb} auto tests

The GDB case is still wrong, but it the data GDB produces.

Change-Id: I97c656a666b98da2f62b354b5d1c699301d67b23
Reviewed-by: hjk <hjk121@nokiamail.com>
Debugger: Remove some GdbOnly test case markers

The tests pass now uniformly.

Change-Id: I45c656a666b98da2f62b354b5d1c699301d67b23
Reviewed-by: hjk <hjk121@nokiamail.com>