Make the version of clang-format changeable.
Make the version of clang-format changeable.

SolidWallOfCode/trafficserver,rpufky/trafficserver,rahmalik/trafficserver,chenglongwei/trafficserver,davidbz/trafficserver,rahmalik/trafficserver,taoyunxing/trafficserver,chitianhao/trafficserver,reveller/trafficserver,bryancall/trafficserver,duke8253/trafficserver,clearswift/trafficserver,PSUdaemon/trafficserver,rpufky/trafficserver,chenglongwei/trafficserver,persiaAziz/trafficserver,dyrock/trafficserver,clearswift/trafficserver,rahmalik/trafficserver,chitianhao/trafficserver,taoyunxing/trafficserver,taoyunxing/trafficserver,duke8253/trafficserver,rahmalik/trafficserver,persiaAziz/trafficserver,vmamidi/trafficserver,vmamidi/trafficserver,bryancall/trafficserver,clearswift/trafficserver,dyrock/trafficserver,reveller/trafficserver,davidbz/trafficserver,SolidWallOfCode/trafficserver,reveller/trafficserver,SolidWallOfCode/trafficserver,vmamidi/trafficserver,clearswift/trafficserver,pbchou/trafficserver,bryancall/trafficserver,davidbz/trafficserver,rahmalik/trafficserver,duke8253/trafficserver,pbchou/trafficserver,davidbz/trafficserver,chenglongwei/trafficserver,davidbz/trafficserver,rpufky/trafficserver,pbchou/trafficserver,reveller/trafficserver,persiaAziz/trafficserver,chenglongwei/trafficserver,taoyunxing/trafficserver,clearswift/trafficserver,rahmalik/trafficserver,chitianhao/trafficserver,PSUdaemon/trafficserver,rpufky/trafficserver,duke8253/trafficserver,reveller/trafficserver,bryancall/trafficserver,dyrock/trafficserver,reveller/trafficserver,PSUdaemon/trafficserver,chenglongwei/trafficserver,pbchou/trafficserver,duke8253/trafficserver,PSUdaemon/trafficserver,PSUdaemon/trafficserver,vmamidi/trafficserver,chenglongwei/trafficserver,rpufky/trafficserver,taoyunxing/trafficserver,duke8253/trafficserver,rahmalik/trafficserver,vmamidi/trafficserver,dyrock/trafficserver,bryancall/trafficserver,chenglongwei/trafficserver,SolidWallOfCode/trafficserver,rpufky/trafficserver,bryancall/trafficserver,dyrock/trafficserver,reveller/trafficserver,rpufky/trafficserver,taoyunxing/trafficserver,chenglongwei/trafficserver,persiaAziz/trafficserver,rahmalik/trafficserver,taoyunxing/trafficserver,vmamidi/trafficserver,davidbz/trafficserver,persiaAziz/trafficserver,duke8253/trafficserver,rpufky/trafficserver,reveller/trafficserver,clearswift/trafficserver,clearswift/trafficserver,PSUdaemon/trafficserver,chitianhao/trafficserver,chitianhao/trafficserver,pbchou/trafficserver,SolidWallOfCode/trafficserver,persiaAziz/trafficserver,PSUdaemon/trafficserver,chitianhao/trafficserver,persiaAziz/trafficserver,rahmalik/trafficserver,clearswift/trafficserver,PSUdaemon/trafficserver,dyrock/trafficserver,clearswift/trafficserver,taoyunxing/trafficserver,SolidWallOfCode/trafficserver,dyrock/trafficserver,taoyunxing/trafficserver,persiaAziz/trafficserver,PSUdaemon/trafficserver,SolidWallOfCode/trafficserver,pbchou/trafficserver,chitianhao/trafficserver,reveller/trafficserver,rpufky/trafficserver