Description of problem:
Remove 3.1, 3.0 and AEP from atomic-openshift-installer due to atomic-openshift-utils 3.2 don't support.


Version-Release number of selected component (if applicable):
OSE 3.2
atomic-openshift-utils-3.2.13

How reproducible:
always

Steps to Reproduce:
1. atomic-openshift-installer install
2.
3.

Actual results:
It prompt we can installed 3.1, 3.0 and AEP, In fact, installer will fail.


#atomic-openshift-installer install
Welcome to the OpenShift Enterprise 3 installation.

Please confirm that following prerequisites have been met:

<--skip-->
Which variant would you like to install?


(1) OpenShift Enterprise 3.2
(2) OpenShift Enterprise 3.1
(3) OpenShift Enterprise 3.0
(4) Atomic Enterprise Platform 3.2
(5) Atomic Enterprise Platform 3.1

Choose a variant from above:  [1]: 2
<--skip--->
<--skip--->


TASK: [docker | Get current installed Docker version] ************************* 
ok: [host4master.example.com]

TASK: [docker | Error out if Docker pre-installed but too old] **************** 
failed: [host4master.example.com] => {"failed": true}
msg: Docker 1.8.2 is installed, but >= 1.9.1 is required.

FATAL: all hosts have already failed -- aborting

PLAY RECAP ******************************************************************** 
           to retry, use: --limit @/root/config.retry

host4master.example.com    : ok=132  changed=15   unreachable=0    failed=1   
host4node.example.com      : ok=48   changed=2    unreachable=0    failed=0   
localhost                  : ok=12   changed=0    unreachable=0    failed=0 

Expected results:


Additional info: