Fix bug 1572 - Reading availability-zone-hint for neutron from config

Fixes bug 1572 by reading the neutron-availability-zone-hint from VIM
plugin configuration, which is then applied at network-creation time.

Note: this patch also fixes some formatting issues that black showed.

Change-Id: Iaf152657ae31748ea6b4a123e8b0a0d9513cb692
Signed-off-by: sousaedu <eduardo.sousa@canonical.com>
diff --git a/RO-VIM-openvim/osm_rovim_openvim/vimconn_openvim.py b/RO-VIM-openvim/osm_rovim_openvim/vimconn_openvim.py
index eab0e75..18d2cd6 100644
--- a/RO-VIM-openvim/osm_rovim_openvim/vimconn_openvim.py
+++ b/RO-VIM-openvim/osm_rovim_openvim/vimconn_openvim.py
@@ -798,7 +798,7 @@
             self._format_request_exception(e)
 
     def new_image(self, image_dict):
-        """ Adds a tenant image to VIM, returns image_id"""
+        """Adds a tenant image to VIM, returns image_id"""
         try:
             self._get_my_tenant()
             new_image_dict = {"name": image_dict["name"][:64]}