Pipelinefix

@chines please only merge when pipeline has passed :)

• fixing cicd pipeline stuff
• including centos78 variabled
• config_repos now dealing with enabling, disabling AND not changing all the time
• the spagetti on slurmd service continues
• small tweak to mellanox driver. I need the kmod install on test-lustre, but not the service activation.

CICD/plays/allnodes.yml

@@ -19,6 +19,7 @@
   - vars/filesystems.yml
   - vars/slurm.yml
   - vars/vars.yml
+  - vars/vars_centos78.yml
   strategy: free
   roles:
 #  - { role: disable_selinux, tags: [ disableselinux ] }