azure migrations

* delete azure credentials
* delete azure inventory sources

awx/main/migrations/_azure_credentials.py

@@ -0,0 +1,15 @@
+import logging
+
+from django.db.models import Q
+
+logger = logging.getLogger('awx.main.migrations')
+
+
+def remove_azure_credentials(apps, schema_editor):
+    '''Azure is not supported as of 3.2 and greater. Instead, azure_rm is
+    supported.
+    '''
+    Credential = apps.get_model('main', 'Credential')
+    logger.debug("Removing all Azure Credentials from database.")
+    Credential.objects.filter(kind='azure').delete()
+