Allow asynchronous user creation.

Reuse 202 code, same like with request, to inform, that user has been allowed
to access, but not created yet.

master/product/Vifib/Tool/VifibRestApiV1Tool.py

@@ -168,6 +168,12 @@ def responseSupport(anonymous=False):
         'GET, OPTIONS')
       if not anonymous:
         if getSecurityManager().getUser().getId() is None:
+          if self.REQUEST.get('USER_CREATION_IN_PROGRESS') is not None:
+            # inform that user is not ready yet
+            self.REQUEST.response.setStatus(202)
+            self.REQUEST.response.setBody(jsonify(
+              {'status':'User under creation.'}))
+          else:
             # force login
             self.REQUEST.response.setStatus(401)
             self.REQUEST.response.setHeader('WWW-Authenticate', 'Bearer realm="%s"'%