deploy: Some fixes related to Haskell packages

..used in dev node for ganeti development.

Signed-off-by: Dimitris Aragiorgis <dimara@grnet.gr>
deploy: Support new gnt-cluster init too

In Ganeti 2.10 --no-lvm-storage and --no-drbd-storage options are
removed and in favor of --enabled-disk-templates.

Signed-off-by: Dimitris Aragiorgis <dimara@grnet.gr>