Add tests for authorization middleware

tests/functional/002_columns/012_get_invisibles_table.log

@@ -0,0 +1,7 @@
+GET /columns/invisibles
+===
+404
+Content-Type: application/json
+Content-Length: 54
+
+{"code":1001,"message":"Table 'invisibles' not found"}

tests/functional/002_columns/013_get_invisible_column.log

@@ -0,0 +1,7 @@
+GET /columns/kunsthåndværk/invisible
+===
+404
+Content-Type: application/json
+Content-Length: 54
+
+{"code":1005,"message":"Column 'invisible' not found"}