Make the ldap test work

src/apps.js

@@ -52,7 +52,8 @@ exports = module.exports = {
     // exported for testing
     _validatePortBindings: validatePortBindings,
     _validateAccessRestriction: validateAccessRestriction,
-    _translatePortBindings: translatePortBindings
+    _translatePortBindings: translatePortBindings,
+    _MOCK_GET_BY_IP_APP_ID: ''
 };
 
 var appdb = require('./appdb.js'),
@@ -488,6 +489,8 @@ function getByIpAddress(ip, callback) {
     assert.strictEqual(typeof ip, 'string');
     assert.strictEqual(typeof callback, 'function');
 
+    if (constants.TEST) return get(exports._MOCK_GET_BY_IP_APP_ID, callback);
+
     docker.getContainerIdByIp(ip, function (error, containerId) {
         if (error) return callback(new AppsError(AppsError.INTERNAL_ERROR, error));