Add etc/openstack.conf.sample to .gitignore
Add etc/openstack.conf.sample to .gitignore

etc/openstack.conf.sample is generated when running the unit tests, so
add it ti .gitignore

Change-Id: Iee41f9f433c3cbe55a832a319564dfb90eec99b7

akash1808/oslo.db,malor/oslo.db,vikt0rs/oslo.db,openstack/oslo.db,magic0704/oslo.db,varunarya10/oslo.db,JioCloud/oslo.db,openstack/oslo.db