Added suites read/write property on TestRun.
Added suites read/write property on TestRun.

bobsilverberg/moztrap,mccarrmb/moztrap,bobsilverberg/moztrap,mozilla/moztrap,mccarrmb/moztrap,shinglyu/moztrap,bobsilverberg/moztrap,mccarrmb/moztrap,shinglyu/moztrap,mozilla/moztrap,shinglyu/moztrap,shinglyu/moztrap,mccarrmb/moztrap,mozilla/moztrap,mccarrmb/moztrap,shinglyu/moztrap,mozilla/moztrap,mozilla/moztrap,bobsilverberg/moztrap