fix unit tests mock classes

Author: Shiranuit

test/mocks/kuzzle.mock.js

@@ -95,6 +95,7 @@ class KuzzleMock extends KuzzleEventEmitter {
       startListening: sinon.spy(),
       joinChannel: sinon.spy(),
       leaveChannel: sinon.spy(),
+      protocols: new Map(),
     };
 
     this.funnel = {

test/mocks/uWS.mock.js

@@ -12,6 +12,8 @@ class MockSocket {
     this.cork = sinon.stub().yields();
     this.getBufferedAmount = sinon.stub().returns(0);
     this.send = sinon.stub();
+    this.headers = {};
+    this.internal = {};
   }
 }