1) Need to use fuel-devops >=3.0.0
2) Need to use centos_master.yaml devops template
3) export CENTOS_MASTER=True environment variable
4) provide path to CENTOS_CLOUD_IMAGE_PATH, FUEL_RELEASE_PATH and
EXTRA_DEB_REPOS
Change-Id: I1542c2238abc364713f02e4bca6ec7646883bf78
Closes-Bug: #1592419