Add timeout to the 'pcs node standby' call.
Add timeout to the 'pcs node standby' call.

It might take a while before pacemaker shutdowns all the resources.
If --wait is specified, pcs will wait up to 'n' seconds for the node(s)
 to be put into standby mode.

This is an attempt to get rid of false-positive like:
""" Failed to connect to the host via ssh.
channel 0: open failed: connect failed: Connection refused\r\n
stdio forwarding failed\r\n
ssh_exchange_identification: Connection closed by remote host"""

Change-Id: I8a3429986e6f07fdf1976c1b559c116f9ec9fc66

redhat-openstack/infrared,okolisny/InfraRed,redhat-openstack/infrared,redhat-openstack/infrared,okolisny/InfraRed,okolisny/InfraRed