Fix TypeError in _unshelve_server

addOnException must accept exc_info, otherwise it will raise
"TypeError: _unshelve_server() takes no arguments (1 given)",
and because there exists check for server status before doing
unshelve_server in _unshelve_server, so we can safely use
addCleanup here, instead of addOnException.

Change-Id: I29759b4120dddd5e42b2ac431dc5884db4f694b5
Closes-Bug: #1741554
2 files changed