fixed public/private visibility in slough

inventory_provider/db/opsdb.py

@@ -419,7 +419,7 @@ WHERE
         if row['router_name'].startswith('sw'):
             return False
         if row['pop_city'].lower() == 'slough' \
-                and row['equipment_model'].upper().startswith('MX'):
+                and not row['equipment_model'].upper().startswith('MX'):
             return False
         return True