Set proper OVS_SYSCONFDIR for the job wher OVS is compiled

Devstack's patch [1] introduced new variable OVS_SYSCONFDIR which by
default points to the /etc/openvswitch directory. But in case of the
jobs where OVS is installed from source there is no such directory and
/usr/local/etc/openvswitch should be used instead.

[1] https://review.opendev.org/c/openstack/devstack/+/779991

Change-Id: I240d0df197e89224c2447625130f02d640116ba1
Related-Bug: #1918656
1 file changed