Set the default pipline config file for tests
Set the default pipline config file for tests

Some of the tests that use a pipeline as a side-effect
(mostly the API tests, now that we create a pipline
automatically in the Pecan hook) only ran if there was
a config file in the production location. This change
resets the default for the pipeline_cfg_file option
to a location that is valid while the tests are running,
even if there is no configuration file in /etc/ceilometer.

Change-Id: I1164df85fd65002660d48d8d76cbfc4a3664f0ea
Signed-off-by: Doug Hellmann <8c845c26a3868dadec615703cd974244eb2ac6d1@dreamhost.com>

rackerlabs/instrumented-ceilometer,rickerc/ceilometer_audit,Juniper/ceilometer,froyobin/ceilometer,sileht/aodh,rickerc/ceilometer_audit,ityaptin/ceilometer,maestro-hybrid-cloud/ceilometer,fabian4/ceilometer,pkilambi/ceilometer,eayunstack/ceilometer,redhat-openstack/ceilometer,luogangyi/Ceilometer-oVirt,chungg/aodh,pczerkas/aodh,mathslinux/ceilometer,citrix-openstack-build/ceilometer,ityaptin/ceilometer,NeCTAR-RC/ceilometer,citrix-openstack-build/ceilometer,MisterPup/Ceilometer-Juno-Extension,froyobin/ceilometer,JioCloud/ceilometer,cernops/ceilometer,chungg/aodh,MisterPup/Ceilometer-Juno-Extension,rackerlabs/instrumented-ceilometer,JioCloud/ceilometer,citrix-openstack-build/ceilometer,maestro-hybrid-cloud/ceilometer,isyippee/ceilometer,tanglei528/ceilometer,rackerlabs/instrumented-ceilometer,fabian4/ceilometer,sileht/aodh,luogangyi/Ceilometer-oVirt,tanglei528/ceilometer,openstack/aodh,tanglei528/ceilometer,isyippee/ceilometer,mathslinux/ceilometer,r-mibu/ceilometer,m1093782566/openstack_org_ceilometer,m1093782566/openstack_org_ceilometer,idegtiarov/ceilometer,NeCTAR-RC/ceilometer,pczerkas/aodh,idegtiarov/ceilometer,openstack/ceilometer,openstack/aodh,r-mibu/ceilometer,NeCTAR-RC/ceilometer,pkilambi/ceilometer,JioCloud/ceilometer,openstack/ceilometer,cernops/ceilometer,eayunstack/ceilometer,rickerc/ceilometer_audit,Juniper/ceilometer,redhat-openstack/ceilometer