Make StateMachine and ShowCommand tasks mutually exclusive
Make StateMachine and ShowCommand tasks mutually exclusive

ShowCommand task inspects peer structures which could get modified at the
same by state machine task. e.g. LastEvent state (string). This can cause
data corruption and lead to crash

Change-Id: I4ac32c8ba72cb9151818c46e9ef2284f592a3d4d
Closes-Bug: 1606392

codilime/contrail-controller,codilime/contrail-controller,codilime/contrail-controller,codilime/contrail-controller,codilime/contrail-controller,codilime/contrail-controller