[Hawkular-dev] checkstyle/enforcer

I just converted the bus code to use hawkular-parent which in turn brought checkstyle/enforcer into play. I highly recommend everyone do this for your code as soon as you can - the earlier you integrate parent, and especially checkstyle/enforcer, the easier it will be on yourself. Lots of checkstyle and enforcer errors in my stuff that I had to go about fixing... you don't want to do this after you have lots of code that needs to be cleaned up.