Description of problem:
------------------------
While creating gluster bricks, using backend-setup of gdeploy, I observed that gdeploy failed in the step to change attributes of the logical volume. 

Note:
This happens consistently with RHEL 7.4 platform, and works well with RHEL 7.3

Version-Release number of selected component (if applicable):
-------------------------------------------------------------
RHEL 7.4
gdeploy-2.0.2-14

How reproducible:
------------------
Always

Steps to Reproduce:
-------------------
1. Create bricks using backend-setup module of gdeploy with RHGS node based on RHEL 7.4 

Actual results:
---------------
gdeploy throws error while changing attributes of the logical volume

Expected results:
------------------
All the steps for backend-setup should work successfully and should not fail


Additional info:
-----------------
Here is the conf file used to create bricks:

[hosts]
host1.example.com
host2.example.com
host3.example.com

[backend-setup]
devices=vdb,vdc

Here is the error snip
<snip>
TASK [Change the attributes of the logical volume] *****************************
failed: [dhcp37-77.lab.eng.blr.redhat.com] (item={u'lv': u'GLUSTER_lv1', u'pool': u'GLUSTER_pool1', u'vg': u'GLUSTER_vg1'}) => {"failed": true, "item": {"lv": "GLUSTER_lv1", "pool": "GLUSTER_pool1", "vg": "GLUSTER_vg1"}, "msg": "  \"GLUSTER_vg1/GLUSTER_vg1/GLUSTER_pool1\": Invalid path for Logical Volume.\n", "rc": 5}
failed: [dhcp37-214.lab.eng.blr.redhat.com] (item={u'lv': u'GLUSTER_lv1', u'pool': u'GLUSTER_pool1', u'vg': u'GLUSTER_vg1'}) => {"failed": true, "item": {"lv": "GLUSTER_lv1", "pool": "GLUSTER_pool1", "vg": "GLUSTER_vg1"}, "msg": "  \"GLUSTER_vg1/GLUSTER_vg1/GLUSTER_pool1\": Invalid path for Logical Volume.\n", "rc": 5}
failed: [dhcp37-209.lab.eng.blr.redhat.com] (item={u'lv': u'GLUSTER_lv1', u'pool': u'GLUSTER_pool1', u'vg': u'GLUSTER_vg1'}) => {"failed": true, "item": {"lv": "GLUSTER_lv1", "pool": "GLUSTER_pool1", "vg": "GLUSTER_vg1"}, "msg": "  \"GLUSTER_vg1/GLUSTER_vg1/GLUSTER_pool1\": Invalid path for Logical Volume.\n", "rc": 5}
...ignoring
failed: [dhcp37-77.lab.eng.blr.redhat.com] (item={u'lv': u'GLUSTER_lv2', u'pool': u'GLUSTER_pool2', u'vg': u'GLUSTER_vg2'}) => {"failed": true, "item": {"lv": "GLUSTER_lv2", "pool": "GLUSTER_pool2", "vg": "GLUSTER_vg2"}, "msg": "  \"GLUSTER_vg2/GLUSTER_vg2/GLUSTER_pool2\": Invalid path for Logical Volume.\n", "rc": 5}
...ignoring
failed: [dhcp37-214.lab.eng.blr.redhat.com] (item={u'lv': u'GLUSTER_lv2', u'pool': u'GLUSTER_pool2', u'vg': u'GLUSTER_vg2'}) => {"failed": true, "item": {"lv": "GLUSTER_lv2", "pool": "GLUSTER_pool2", "vg": "GLUSTER_vg2"}, "msg": "  \"GLUSTER_vg2/GLUSTER_vg2/GLUSTER_pool2\": Invalid path for Logical Volume.\n", "rc": 5}
...ignoring
failed: [dhcp37-209.lab.eng.blr.redhat.com] (item={u'lv': u'GLUSTER_lv2', u'pool': u'GLUSTER_pool2', u'vg': u'GLUSTER_vg2'}) => {"failed": true, "item": {"lv": "GLUSTER_lv2", "pool": "GLUSTER_pool2", "vg": "GLUSTER_vg2"}, "msg": "  \"GLUSTER_vg2/GLUSTER_vg2/GLUSTER_pool2\": Invalid path for Logical Volume.\n", "rc": 5}

</snip>