WSGI: Move the application creation within the app method

Otherwise the application is likely ever loaded once instead of being
put back into the context every time.

Change-Id: I686bea29bc4f6e2450dcc47e94640ace6f73dcc6

ara/wsgi.py

@@ -50,7 +50,6 @@
 from flask import current_app  # flake8: noqa
 
 log = logging.getLogger(__name__)
-app = create_app()
 
 
 def application(environ, start_response):
@@ -60,6 +59,7 @@ def application(environ, start_response):
         if 'ANSIBLE_CONFIG' not in os.environ:
             log.warn('ANSIBLE_CONFIG environment variable not found.')
 
+    app = create_app()
     if not current_app:
         ctx = app.app_context()
         ctx.push()