collect-logs: explicit timeouts for ovn commands
collect-logs: explicit timeouts for ovn commands

When log collection is performed on broken deployment
(e.g. after OC deploy failed) ovn db and such can be
in bad state (db unreachable) and ovn commands seems to hang
in such case for very long time. For that they need to be guarded
by explicit timeouts (normally seems they finish in "no-time" <1s).

Change-Id: I70a65b42642af840695aa9a46aca667faeba8111

redhat-openstack/infrared,redhat-openstack/infrared,redhat-openstack/infrared