This bug was initially created as a copy of Bug #1778016

I am copying this bug because: 
ovn 2.13 has this issue too.


Description of problem:
ovn-nbctl --daemon --pidfile is also related by openvswitch,but ovn 2.12 is seperated from ovs now

Version-Release number of selected component (if applicable):
openvswitch2.12-2.12.0-8.el7fdp
ovn2.12-2.12.0-15.el7fdp
ovn2.12-central-2.12.0-15.el7fdp
ovn2.12-host-2.12.0-15.el7fdp
How reproducible:
always

Steps to Reproduce:

only start ovn,but didn't start ovs

rlRun "systemctl start ovn-northd"
        rlRun "pkill -9 ovn-nbctl" "0-255"
        rlRun "ovn_daemon_pid=$(ovn-nbctl --pidfile --detach)"
:: [ 20:04:36 ] :: [  BEGIN   ] :: Running 'systemctl start ovn-northd'
:: [ 20:04:36 ] :: [   PASS   ] :: Command 'systemctl start ovn-northd' (Expected 0, got 0)
:: [ 20:04:36 ] :: [  BEGIN   ] :: Running 'pkill -9 ovn-nbctl'
:: [ 20:04:36 ] :: [   PASS   ] :: Command 'pkill -9 ovn-nbctl' (Expected 0-255, got 1)
ovn-nbctl: /var/run/openvswitch/ovn-nbctl.pid.tmp: create failed (No such file or directory)
:: [ 20:04:36 ] :: [  BEGIN   ] :: Running 'ovn_daemon_pid='
:: [ 20:04:36 ] :: [   PASS   ] :: Command 'ovn_daemon_pid=' (Expected 0, got 0)
2019-11-29T01:04:36Z|00001|unixctl|WARN|failed to connect to /var/run/openvswitch/ovnnb_db.ctl
ovs-appctl: cannot connect to "/var/run/openvswitch/ovnnb_db.ctl" (No such file or directory)

Actual results:
ovn-nbctl: /var/run/openvswitch/ovn-nbctl.pid.tmp: create failed

Expected results:
ovn-nbctl: /var/run/ovn/ovn-nbctl.pid.tmp 
I think this file should create under the path /var/run/ovn/

Additional info: