Add new startFirstNode function

Function to restore galera master node
according documentation:
https://docs.mirantis.com/mcp/q4-18/mcp-operations-guide/tshooting/
tshoot-mcp-openstack/tshoot-galera/restore-galera-cluster/
restore-galera-manually.html#restore-galera-manually

Change-Id: Ibe1d7614bcb73b49c747e12fe7ace15c04a810d5
Related-Prod: PROD-29630
1 file changed