Create cloud config when using azure provider

When using the azure cloud provider generate azure.conf file using
provided variables. Also, ensure that required configuration variables
are defined when sanitizing the inventory.

roles/openshift_cloud_provider/tasks/azure.yml

@@ -4,3 +4,8 @@
     name: virt_use_samba
     state: yes
     persistent: yes
+
+- name: create cloud config
+  template:
+    dest: "{{ openshift.common.config_base }}/cloudprovider/azure.conf"
+    src: azure.conf.j2

roles/openshift_cloud_provider/templates/azure.conf.j2

@@ -0,0 +1,7 @@
+tenantId: {{ openshift_cloudprovider_azure_tenant_id }}
+subscriptionId: {{ openshift_cloudprovider_azure_subscription_id }}
+aadClientId: {{ openshift_cloudprovider_azure_client_id }}
+aadClientSecret: {{ openshift_cloudprovider_azure_client_secret }}
+aadTenantId: {{ openshift_cloudprovider_azure_tenant_id }}
+resourceGroup: {{ openshift_cloudprovider_azure_resource_group }}
+location: {{ openshift_cloudprovider_azure_location }}

roles/openshift_sanitize_inventory/tasks/main.yml

@@ -77,6 +77,24 @@
         openshift_cloudprovider_vsphere_host is undefined or openshift_cloudprovider_vsphere_datacenter is undefined or
         openshift_cloudprovider_vsphere_datastore is undefined )
 
+- name: Ensure azure configuration variables are defined
+  when: openshift_cloudprovider_kind | default('none') == 'azure'
+  block:
+    - name: ensure provider configuration variables are defined
+      fail:
+        msg: >
+          Required variable(s) for azure provider not defined. Refer to documentation
+          for more information on configuring for azure provider.
+
+          https://github.com/openshift/openshift-docs/blob/master/install_config/configuring_azure.adoc
+      when: >
+        openshift_cloudprovider_azure_client_id is not defined
+        or openshift_cloudprovider_azure_client_secret is not defined
+        or openshift_cloudprovider_azure_tenant_id is not defined
+        or openshift_cloudprovider_azure_subscription_id is not defined
+        or openshift_cloudprovider_azure_resource_group is not defined
+        or openshift_cloudprovider_azure_location is not defined
+
 - name: Ensure removed web console extension variables are not set
   fail:
     msg: >