core: Fencing flow fails to get to secondery PM...

Fencing flow fails to get to secondary PM (primary is deliberately
configured with wrong params)

Reason for the thrown exception was an unmatched parenthesis in
the log message.

The second parameter passed was {2) instead of {2}

Change-Id: Iec2e0d6b77f0e01e36c01ea1d397862e293ee7ef
Bug-Url: https://bugzilla.redhat.com/show_bug.cgi?id=1013654
Signed-off-by: Eli Mesika <emesika@redhat.com>