Description of problem:
===================
on live RHEL 7.5 +RHGS 3.4, I installed colonizer after subscribing to ansible channel
However when running colonizer deployment, it is failing with pexpect unavailability as below
[root@rhs-client28 oemid]# gluster-colonizer.py -f g1-oemid-kvm-nas.yml 
Traceback (most recent call last):
  File "/usr/bin/gluster-colonizer.py", line 50, in <module>
    import pexpect
ImportError: No module named pexpect


Previously, when checked about 10 days back(as part of 3.4.0 live testing), I never hit this issue, however hitting it now




Version-Release number of selected component (if applicable):
rhel 7.5 
rhgs 3.4
colonizer-1.2.2
ansible 2.6.4-1




How reproducible:
===========
always


Steps to Reproduce:
1.install colonizer
2.run a deployment script 
3.it fails with pexpect module unavailable


Expected results:
-----------
pexpect should be installed as part of initial installation as dependency if need be, and deployment should not fail due to this


Additional info:
################
[root@rhs-client28 gluster-colonizer]# cd oemid/
[root@rhs-client28 oemid]# gluster-colonizer.py -f g1-oemid-kvm-nas.yml 
Traceback (most recent call last):
  File "/usr/bin/gluster-colonizer.py", line 50, in <module>
    import pexpect
ImportError: No module named pexpect

[root@rhs-client28 oemid]# yum install pexpect

[root@rhs-client28 oemid]# yum install pexpect
Loaded plugins: product-id, search-disabled-repos, subscription-manager
rh-gluster-3-for-rhel-7-server-rpms                                                           | 4.0 kB  00:00:00     
rhel-7-server-ansible-2-rpms                                                                  | 4.0 kB  00:00:00     
rhel-7-server-rpms                                                                            | 3.5 kB  00:00:00     
Resolving Dependencies
--> Running transaction check
---> Package pexpect.noarch 0:2.3-11.el7 will be installed
--> Finished Dependency Resolution

Dependencies Resolved

=====================================================================================================================
 Package                 Arch                   Version                     Repository                          Size
=====================================================================================================================
Installing:
 pexpect                 noarch                 2.3-11.el7                  rhel-7-server-rpms                 142 k

Transaction Summary
=====================================================================================================================
Install  1 Package

Total download size: 142 k
Installed size: 784 k
Is this ok [y/d/N]: y
Downloading packages:
pexpect-2.3-11.el7.noarch.rpm                                                                 | 142 kB  00:00:02     
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
  Installing : pexpect-2.3-11.el7.noarch                                                                         1/1 
  Verifying  : pexpect-2.3-11.el7.noarch                                                                         1/1 

Installed:
  pexpect.noarch 0:2.3-11.el7                                                                                        

Complete!
[root@rhs-client28 oemid]# gluster-colonizer.py -f g1-oemid-kvm-nas.yml 
    ____  __  _______    ____
   / __ \/ / / / ___/   / __ \____  ___
  / /_/ / /_/ /\__ \   / / / / __ \/ _ \
 / _, _/ __  /___/ /  / /_/ / / / /  __/
/_/ |_/_/ /_//____/   \____/_/ /_/\___/


Welcome to the Red Hat Storage One Gluster deployment tool!

This node will be configured as the deployment master for your
Gluster storage pool. Before proceeding, please ensure that
all RHS One Gluster nodes are connected to the management
network infrastructure and are booted.

Do you wish to continue? [Y/n] y


Begin RHS One Gluster inventory phase


Your deployment node type is 	KVM-node
Your deployment flavor is 	NAS

How many RHS One Gluster nodes are you deploying?

   Number of nodes (valid range is 4-24): 



Something went wrong and the deployment is being aborted.