Change default eswitchd port to avoid conflict

Previous default for eswitch/daemon_endpoint would set a TCP port (5001)
which is in the range of the well known ports.
Change to unreserved port (60001) will avoid that conflict.

Change-Id: I711c4659f497e44a6041ec9958835c1f2f4174a7
Closes-Bug: #1245885
(cherry picked from commit cd542a7f1f2ea21d3694e70b8e6a6db0efbd3a01)
Merge branch 'stable/havana' of https://github.com/openstack/quantum into havana/stable