fix: add cleanup in log-game-task test

Ran the tests a few times and now they complete
right afteer they are ran, they don't hang. What
I did was adding an afterEach in the LogGameTask
test to stop the game it started to test its
monitoring, since the random error seemed to be
caused by a game running wild and sometimes
ending badly.

client/test/unit/application/log-game-task.test.js

@@ -38,6 +38,10 @@ describe('The log game task', function () {
 				secondPlayer = state.players()[1];
 			});
 	});
+
+	afterEach(function () {
+		gameTask.stop()
+	});
 
 	it('when dice finishes rolling, sends a message', function (done) {
 		gameTask.rollDiceTaskCreated().take(1).subscribe(function (task) {