Bug 1387704

Description of problem:

We are using the facts that get set for a containerized master and the delegating the task to the RPM master. The openshift.common.client_binary is set differently for containerized vs RPM installs. 

RPM:  /usr/bin/oadm
Containerized: /usr/local/bin/oadm

We first fail on task openshift_master_certificates


Version-Release number of selected component (if applicable):
3.3 

How reproducible:
100%

Steps to Reproduce:
 - Set master1 to RPM install, set master2 to containerized install 
 - Run installer fail on task openshift_master_certificates


Additional info:
Suggested fix: 
1. Create a symbolic link on 1st master 
   # ln -s /usr/local/bin/oadm /usr/bin/openshift

2. ensure the fact, client_binary, used is for the openshift_ca_host hostvars[openshift_ca_host].openshift.common.client_binary


TASK WHERE WE FAIL: 

https://github.com/openshift/openshift-ansible/blob/master/roles/openshift_master_certificates/tasks/main.yml#L53-L65

TASK [openshift_master_certificates : Create the master certificates if they do not already exist] ***
skipping: [master-1.example.com]
fatal: [master-2.example.com -> master-1.example.com]: FAILED! => {"changed": false, "cmd": "/usr/local/bin/oadm create-master-certs --hostnames=kubernetes.default,kubernetes,master-2.example.com,openshift.public.example.com,openshift.example.com,openshift.default.svc,ope
nshift.default,172.30.0.1,192.168.0.5,openshift.default.svc.cluster.local,kubernetes.default.svc,kubernetes.default.svc.cluster.local,openshift --master=https://openshift.example.com --public-master=https://openshift.public.example.com --cert-dir=/etc/origin/generated-con
figs/master-master-2.example.com --overwrite=false", "failed": true, "msg": "[Errno 2] No such file or directory", "rc": 2}