Fail if autidisk_size is less than 10GB

The disk size must be at least 10GB for ceph to work smoothly.
The reasons for minimum 10GB are:

* Ceph OSD journal need at least 2GB, otherwise journal creation fail
* OSD need at least 7-8GB to hold default and pools for openstack,
    otherwise data write to the pools will fail.
Support ceph storage cluster less than 3 nodes

By default ceph cluster need at least three nodes to be in the
cluster to store data in it, as default number of object replicas
is 3.
Adding a parameter to change number of object replicas of all pools,
so that anyone need less than 3 nodes in cluster can specify appropriate
replication factor (1 or 2) to make the cluster up.
Fix failing tests

This patch fixes failing tests form the consul
commit.
Merge pull request #91 from bodepd/fix_tests

Fix failing tests
Let Soren, Dan, Harish and Jenkins log in and sudo
Merge pull request #90 from bodepd/users

Let Soren, Dan, Harish and Jenkins log in and sudo
Merge pull request #81 from hkumarmk/ensure_minimum_ceph_autodisksize

Fail if autidisk_size is less than 10GB
Merge pull request #82 from hkumarmk/support_ceph_cluster_lessthan_three_nodes

Support ceph storage cluster less than 3 nodes
Add more dependencies
Add Jenkins slave node to manifest
Populate git config for jiojenkins
Account setup moved