Add a timer to Oddball

I had a pretty unfun experience, where we had a team of highly skilled players dominate a game of Oddball but on the last round they stopped picking up the ball and started going exclusively for kills. As there was no time limit, this could of gone on forever and in my eyes just encourages people to inflate their K/D.

My team eventually pulled through, but it was a very draining experience and put a sour taste in my teams mouth.