Add move constructor and assignment to ats_scoped_fd.
Add move constructor and assignment to ats_scoped_fd.

pbchou/trafficserver,vmamidi/trafficserver,chitianhao/trafficserver,SolidWallOfCode/trafficserver,duke8253/trafficserver,duke8253/trafficserver,SolidWallOfCode/trafficserver,pbchou/trafficserver,dyrock/trafficserver,vmamidi/trafficserver,persiaAziz/trafficserver,duke8253/trafficserver,chitianhao/trafficserver,duke8253/trafficserver,pbchou/trafficserver,duke8253/trafficserver,persiaAziz/trafficserver,dyrock/trafficserver,vmamidi/trafficserver,dyrock/trafficserver,SolidWallOfCode/trafficserver,persiaAziz/trafficserver,pbchou/trafficserver,bryancall/trafficserver,persiaAziz/trafficserver,chitianhao/trafficserver,bryancall/trafficserver,duke8253/trafficserver,SolidWallOfCode/trafficserver,persiaAziz/trafficserver,persiaAziz/trafficserver,davidbz/trafficserver,bryancall/trafficserver,dyrock/trafficserver,SolidWallOfCode/trafficserver,davidbz/trafficserver,SolidWallOfCode/trafficserver,chitianhao/trafficserver,duke8253/trafficserver,chitianhao/trafficserver,dyrock/trafficserver,chitianhao/trafficserver,persiaAziz/trafficserver,bryancall/trafficserver,pbchou/trafficserver,davidbz/trafficserver,persiaAziz/trafficserver,vmamidi/trafficserver,vmamidi/trafficserver,dyrock/trafficserver,davidbz/trafficserver,SolidWallOfCode/trafficserver,davidbz/trafficserver,davidbz/trafficserver,pbchou/trafficserver,bryancall/trafficserver,dyrock/trafficserver,bryancall/trafficserver,chitianhao/trafficserver,vmamidi/trafficserver