Running sheepdog with systemd was failed

[Rikimaru Honjo]

stack.sh of latest devstack[1] was executed with devstack-plugin-sheepdog in cinder CI.
As a result, running sheepdog was failed.

[1]This devstack used systemd.

[logs]

http://logs.openstack.org/86/449386/1/check/gate-tempest-dsvm-full-sheepdog-ubuntu-xenial-nv/36533b8/logs/devstacklog.txt.gz

[...]
2017-05-15 03:11:56.423 | ++ functions-common:run_process:1573 : [[ True = \T\r\u\e ]]
2017-05-15 03:11:56.425 | ++ functions-common:run_process:1574 : _run_under_systemd sheepdog 'sheep -l dst=stdout,level=debug,format=server -c local -n /opt/stack/data/sheepdog' '' ''
2017-05-15 03:11:56.427 | ++ functions-common:_run_under_systemd:1513 : local service=sheepdog
2017-05-15 03:11:56.429 | ++ functions-common:_run_under_systemd:1514 : local 'command=sheep -l dst=stdout,level=debug,format=server -c local -n /opt/stack/data/sheepdog'
2017-05-15 03:11:56.431 | ++ functions-common:_run_under_systemd:1515 : local 'cmd=sheep -l dst=stdout,level=debug,format=server -c local -n /opt/stack/data/sheepdog'
2017-05-15 03:11:56.433 | ++ functions-common:_run_under_systemd:1517 : _common_systemd_pitfalls 'sheep -l dst=stdout,level=debug,format=server -c local -n /opt/stack/data/sheepdog'
2017-05-15 03:11:56.435 | ++ functions-common:_common_systemd_pitfalls:1485 : local 'cmd=sheep -l dst=stdout,level=debug,format=server -c local -n /opt/stack/data/sheepdog'
2017-05-15 03:11:56.438 | ++ functions-common:_common_systemd_pitfalls:1488 : [[ sheep -l dst=stdout,level=debug,format=server -c local -n /opt/stack/data/sheepdog =~ sudo ]]
2017-05-15 03:11:56.440 | ++ functions-common:_common_systemd_pitfalls:1499 : [[ ! sheep -l dst=stdout,level=debug,format=server -c local -n /opt/stack/data/sheepdog =~ ^/ ]]
2017-05-15 03:11:56.442 | ++ functions-common:_common_systemd_pitfalls:1500 : local msg=
2017-05-15 03:11:56.444 | ++ functions-common:_common_systemd_pitfalls:1506 : die 1506
2017-05-15 03:11:56.446 | ++ functions-common:die:186 : local exitcode=0
2017-05-15 03:11:56.448 | [Call Trace]
2017-05-15 03:11:56.448 | ./stack.sh:1207:run_phase
2017-05-15 03:11:56.448 | /opt/stack/new/devstack/functions-common:2001:run_plugins
2017-05-15 03:11:56.448 | /opt/stack/new/devstack/functions-common:1968:source
2017-05-15 03:11:56.448 | /opt/stack/new/devstack-plugin-sheepdog/devstack/plugin.sh:132:start_sheepdog
2017-05-15 03:11:56.448 | /opt/stack/new/devstack-plugin-sheepdog/devstack/plugin.sh:90:run_process
2017-05-15 03:11:56.448 | /opt/stack/new/devstack/functions-common:1574:_run_under_systemd
2017-05-15 03:11:56.449 | /opt/stack/new/devstack/functions-common:1517:_common_systemd_pitfalls
2017-05-15 03:11:56.449 | /opt/stack/new/devstack/functions-common:1506:die
2017-05-15 03:11:56.452 | [ERROR] /opt/stack/new/devstack/functions-common:1506
2017-05-15 03:11:57.456 | Error on exit

[OpenStack Infra (hudson-openstack)]

Change abandoned by Rikimaru Honjo (<email address hidden>) on branch: master
Review: https://review.openstack.org/464995

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/465011
Committed: https://git.openstack.org/cgit/openstack/devstack-plugin-sheepdog/commit/?id=ba843990c9335ea4bd2f1db2a8377b264ddd0524
Submitter: Jenkins
Branch: master

commit ba843990c9335ea4bd2f1db2a8377b264ddd0524
Author: Rikimaru Honjo <email address hidden>
Date: Tue May 16 18:58:32 2017 +0900

    Fix plugin for systemd

    Current devstack uses systemd for running processes.[1]
    As a result, path of process should be specified as full path.
    So this patch fixes specifying path.

    [1]https://docs.openstack.org/developer/devstack/systemd.html

    Change-Id: I0742a8f746a7ba7a3394e9e3bb5ab3a7ba857e04
    Closes-Bug: #1691066