fix a3 alias assignment

rotation_z and stick_rotation need seperate entries in frappy_config

setups/frappy.py

@@ -33,15 +33,19 @@ devices = dict(
             'alias': ['B', 'magfield'],
             'targets': {'se_mf': 20},
         },
-        rotation_z = {
+        rotation_z={
             # possible names of the instruments main omega alias
             # only one of these must be an alias, and this is then used
-            'unique': ['a3', 'om'],
+            'predefined_alias': ['a3', 'om'],
+            'targets': {'se_om': 20},
+            'envlist': False,
+        },
+        stick_rotation={
             'alias': 'dom',
             'targets': {'se_om': 20, 'se_stickrot': 19},
             'envlist': False,
         }
-   )
+    )
 )
 
 startupcode = '''