deploy: Introduce LVM and DRBD components

Move both out of Ganeti component and make VMC depend on them.

Signed-off-by: Dimitris Aragiorgis <dimara@grnet.gr>
deploy: Add simple logger

..to avoid Fabric error: No handlers could be found for logger
“paramiko.transport”.

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