[PAXCDI-143] Use Bundle Class Loader as a TCCL on Weld shutdown

Setup bundle class loader as a TCCL in WeldCdiContainer#doStop() like WeldCdiContainer#doStart() is doing already.
Merge pull request #11 from igarashitm/PAXCDI-143

[PAXCDI-143] Use Bundle Class Loader as a TCCL on Weld shutdown