Squashed 'elasticluster/providers/ansible-playbooks/' changes from f4141ea..e6e9837

e6e9837 Fix gridengine on CentOS: error while trying to export a directory *before* nfs server was installed.

git-subtree-dir: elasticluster/providers/ansible-playbooks
git-subtree-split: e6e983795dcbc5e7cbd4cea2d59659a467681355
Merge commit '4f2dafcc8152ad7883e20f2f1f722c8e6911ad85'