mon: force peer addition

mon: force peer addition

Somewhat something changed with the introduction of msg2 and we have to
add each node as a peer so the monitors can form a quorum. This might be
due to our CI environment, although adding this is completly harmless
and solves monitors not being able to form quorum.

It seems that the initial monitor map wasn't containing the right
information about the peers (addresses like 0.0.0.0/0r1, for each rank.

Signed-off-by: Sébastien Han <seb@redhat.com>