set a default connection string

src/test/appsettings.Development.json

@@ -43,6 +43,9 @@
         }
     },
     "Data": {
+      "DefaultConnection": {
+        "ConnectionString": "Server=localhost;Port=5432;Database=YavscDev;Username=yavscdev;Password=admin;"
+      },
       "DevConnection": {
             "Database":"postgres",
             "Server": "localhost",