Adding manage_service parameter to all services

When set to false, enables puppet to configure a service without
starting/stopping it on each run.  This may be necessary when
using an external clustering system (Corosync/Pacemaker, for
example).  Defaults to true.

Change-Id: Icadfd9fcfab322550a04b1ffb77c55383c9b292c
Add backend for GlusterFS, Nexanta, SAN, and SolidFire

Some drivers could not be used in multi backends mode. This
commit adds a backend class for theses drivers and make use
of them in their respective cloud::volume::* class

Change-Id: I2939610cfc078d6ec6b85e5516138620b106237f
Merge "Add backend for GlusterFS, Nexanta, SAN, and SolidFire"
Merge "Adding manage_service parameter to all services"