Adding instructions for integration tests in readme

readme.md

@@ -40,6 +40,21 @@ This module will instrument the output HTML with meta data, so you should only e
 
 Now when you load any pages they will contain meta data about block & containers. 
 
+## Integration tests
+
+Module is dev feature and its output shouldn't be visible in integration tests. In order to
+disable it for integration tests add following instruction to install-config-mysql.php:
+
+```
+'disable-modules'   => implode(
+        ',',
+        [
+            'Jh_BlockLogger'
+        ]
+    ),
+```
+
+
 ## Use it with M2 Dev Tools Chrome/Firefox Extension
 
 With this module enabled, you'll get access to all the M2 Dev Tools features.