Make sure that OpenSSL is installed before use

Signed-off-by: Federico Simoncelli <fsimonce@redhat.com>

playbooks/common/openshift-master/config.yml

@@ -244,6 +244,8 @@
   - fail:
       msg: "openshift_master_session_auth_secrets and openshift_master_encryption_secrets must be equal length"
     when: (openshift_master_session_auth_secrets is defined and openshift_master_session_encryption_secrets is defined) and (openshift_master_session_auth_secrets | length != openshift_master_session_encryption_secrets | length)
+  - name: Install OpenSSL package
+    action: "{{ansible_pkg_mgr}} pkg=openssl state=present"
   - name: Generate session authentication key
     command: /usr/bin/openssl rand -base64 24
     register: session_auth_output