cli: make sure history /connect entry removed even in case of internal failure
cli: make sure history /connect entry removed even in case of internal failure

unsuccessful /connect attempt won't be logged anyway (as history
collector not enabled yet), this patch prepares infrastructure
for future use where internal failures can occur before
self.__remove_history_entry() get called.

Change-Id: I7bcd15cf93e1a46eb07eacfb29e5f0751e021ace
Signed-off-by: Michael Pasternak <af5566a40fc9757136fd9da9ca5e2dbdd9b039eb@redhat.com>

oVirt/ovirt-engine-cli,oVirt/ovirt-engine-cli