Fix corosync_nodes usage
Fix corosync_nodes usage

In Fuel 9.0 corosync module interface has been changed.
We need to adjust our modules accordingly.

Change-Id: If651bf36aa81e3f9ead5297666b27b4535bb24f3

Tesora/fuel-plugin-tesora-dbaas,Tesora/fuel-plugin-tesora-dbaas