FSID should be automatically generated

The included patches do the following:

* Remove hardcoded values
* Generates a UUID for the fsid

These values are created at the time the proposal is created.

Signed-off-by: JuanJose 'JJ' Galvez <jj.galvez@inktank.com>

Conflicts:
	chef/cookbooks/ceph/attributes/default.rb