Put base test config in Yaml dataset

tests/datasets/api.yml

@@ -1,13 +1,27 @@
 ---
 # Empty these tables
 cache:
-config:
 conversation:
 pconfig:
 photo:
 workerqueue:
 mail:
 
+# Base test config to avoid notice messages
+config:
+    -
+        cat: system
+        k: url
+        v: http://localhost
+    -
+        cat: system
+        k: hostname
+        v: localhost
+    -
+        cat: system
+        k: worker_dont_fork
+        v: 1
+
 # Populate tables with test data
 user:
     -