Use the name attribute from fabric dict if exists

When creating the fabrics, use the name attribute from the fabric dict
if that exists. If no name is specified, fall back to the dict key as
the legacy implementation did

Change-Id: Ica4d3a0261ae2ff849ac1bbc07251a9f73b74a43

_modules/maas.py

@@ -193,8 +193,12 @@ def __init__(self):
         self._config_path = 'region.fabrics'
 
     def fill_data(self, name, fabric):
+        try:
+            fabric_name = fabric['name']
+        except KeyError:
+            fabric_name = name
         data = {
-            'name': name,
+            'name': fabric_name,
             'description': fabric.get('description', ''),
         }
         if 'class_type' in fabric: