fix issue when there is no credentials applied

will need to add more dummy for aws and gcp when we add more public cloud demos

roles/install_demo/tasks/unsupported_cloud.yml

@@ -0,0 +1,16 @@
+- name: public cloud not supported
+  debug:
+    msg: "there is no public cloud credentials for this install, installing dummy creds"
+
+- name: add azure credential
+  tower_credential:
+    name: azure_credential
+    description: Azure Service Principle
+    organization: "{{ vars[demo].project.organization }}"
+    state: present
+    kind: azure_rm
+    subscription: "please replace me"
+    tower_username: "{{ my_tower_username }}"
+    tower_password: "{{ my_tower_password }}"
+    tower_host: "{{ my_tower_host }}"
+    validate_certs: false