Debugger: Fix QVariant indirect access with LLDB

We need explicit toInteger() when operation on SBValues.

Change-Id: Ibc74b59e971933fef8ef94c20333035188d33a57
Reviewed-by: hjk <hjk121@nokiamail.com>
Debugger: Merge QHash dumper tests

Less cycles.

Change-Id: Id48e0c4b1c6b71dc0c743f8815db2d6b1daa95f6
Reviewed-by: hjk <hjk121@nokiamail.com>
Debugger: Move Python setup closer to debugger startup

It's unconditional nowadays, so we don't gain anything but code path
complexity from defering it.

Change-Id: Icc7d65835d1b2b76ecb64601822e0d70fd8f9f6e
Reviewed-by: hjk <hjk121@nokiamail.com>