Set kubernetes_namespace when deploying on OpenShift

kubernetes_namespace is referenced later it the role but may not be set if deploying on openshift

installer/roles/kubernetes/tasks/openshift.yml

@@ -1,6 +1,10 @@
 ---
 - include_vars: openshift.yml
 
+- name: Set kubernetes_namespace
+  set_fact:
+    kubernetes_namespace: "{{ awx_openshift_project }}"
+
 - name: Ensure workspace directories exist
   file:
     path: "{{ item  }}"