Add installation steps for Ceph one-node cluster

Add steps to install Ceph one-node cluster over virtlet
installation to be able to test Ceph related virtlet features.

Change-Id: Ic9e531a69fcb52d7360fcf089312fa1913350e0b
Reviewed-on: https://review.gerrithub.io/362388
Reviewed-by: Tatyanka Leontovich <tleontovich@mirantis.com>
Tested-by: Tatyanka Leontovich <tleontovich@mirantis.com>
diff --git a/tcp_tests/helpers/ext.py b/tcp_tests/helpers/ext.py
index 748efee..470206b 100644
--- a/tcp_tests/helpers/ext.py
+++ b/tcp_tests/helpers/ext.py
@@ -41,6 +41,7 @@
     'openstack_deployed',
     'sl_deployed',
     'virtlet_deployed',
+    'virtlet_ceph_deployed',
 )
 
 LOG_LEVELS = enum(