Removed unsafe usage of ResolvedServiceMember in actor catch

If subscribe/unsubscribe failed due to service member migration or cluster stop, using ResolvedServiceMember can fail to resolve the service member and prematuraly kill the  ResolvedServiceMember. The actor wait foreever the Kill message will be send later, freezing the server.
Merge pull request #203 from wajam/manu-kill-error-freeze

Removed unsafe usage of ResolvedServiceMember in actor catch