If the vsctl_timeout > OVS's inactivity probe interval and a
transaction execution time exceeds the probe interval, OVS will
disconnect and the transaction will return TRY_AGAIN and most
likely repeat failing until the vsctl_timeout is reached. This
change ensures that the "failsafe" creation of the manager also
sets the inactivity probe to the vsctl_timeout value.
Currently the patch doesn't override the probe_interval on an
existing Manager since it is possible that connection is used by
outside applications and it theoretically should be handled at
deployment.
Related-Bug: #1627106
Change-Id: I76fa0a0cf04a166edf062086fceb2fd90960ad6b