Run Documentation formatting in parallel
Run Documentation formatting in parallel

AsciiDoc is slow. Run 8 forks in parallel, assuming most developers
building Gerrit need at least 4 cores to get through the GWT builds.

Change-Id: Icf1a244d528f91aa5b8fbc10aa905ce3b32a3535

GerritCodeReview/gerrit,GerritCodeReview/gerrit,bpollack/gerrit,Team-OctOS/host_gerrit,qtproject/qtqa-gerrit,ckamm/gerrit,thinkernel/gerrit,Seinlin/gerrit,netroby/gerrit,joshuawilson/merrit,midnightradio/gerrit,joshuawilson/merrit,midnightradio/gerrit,jackminicloud/test,qtproject/qtqa-gerrit,jackminicloud/test,gcoders/gerrit,bootstraponline-archive/gerrit-mirror,joshuawilson/merrit,bpollack/gerrit,pkdevbox/gerrit,Overruler/gerrit,gcoders/gerrit,basilgor/gerrit,pkdevbox/gerrit,thesamet/gerrit,qtproject/qtqa-gerrit,thesamet/gerrit,Distrotech/gerrit,thesamet/gerrit,Distrotech/gerrit,basilgor/gerrit,gracefullife/gerrit,GerritCodeReview/gerrit,MerritCR/merrit,Distrotech/gerrit,Saulis/gerrit,quyixia/gerrit,netroby/gerrit,joshuawilson/merrit,netroby/gerrit,zommarin/gerrit,jackminicloud/test,netroby/gerrit,zommarin/gerrit,Distrotech/gerrit,Team-OctOS/host_gerrit,supriyantomaftuh/gerrit,pkdevbox/gerrit,gracefullife/gerrit,renchaorevee/gerrit,renchaorevee/gerrit,Distrotech/gerrit,netroby/gerrit,GerritCodeReview/gerrit,supriyantomaftuh/gerrit,WANdisco/gerrit,joshuawilson/merrit,WANdisco/gerrit,basilgor/gerrit,thesamet/gerrit,thesamet/gerrit,hdost/gerrit,Team-OctOS/host_gerrit,jackminicloud/test,hdost/gerrit,MerritCR/merrit,Distrotech/gerrit,pkdevbox/gerrit,Saulis/gerrit,joshuawilson/merrit,gcoders/gerrit,bootstraponline-archive/gerrit-mirror,bpollack/gerrit,qtproject/qtqa-gerrit,pkdevbox/gerrit,zommarin/gerrit,jackminicloud/test,joshuawilson/merrit,ckamm/gerrit,supriyantomaftuh/gerrit,gracefullife/gerrit,bootstraponline-archive/gerrit-mirror,midnightradio/gerrit,bpollack/gerrit,supriyantomaftuh/gerrit,thinkernel/gerrit,dwhipstock/gerrit,anminhsu/gerrit,TonyChai24/test,ckamm/gerrit,gcoders/gerrit,gerrit-review/gerrit,gerrit-review/gerrit,gerrit-review/gerrit,jackminicloud/test,qtproject/qtqa-gerrit,bpollack/gerrit,thinkernel/gerrit,dwhipstock/gerrit,GerritCodeReview/gerrit,Team-OctOS/host_gerrit,renchaorevee/gerrit,quyixia/gerrit,hdost/gerrit,TonyChai24/test,Overruler/gerrit,bootstraponline-archive/gerrit-mirror,dwhipstock/gerrit,pkdevbox/gerrit,bootstraponline-archive/gerrit-mirror,renchaorevee/gerrit,Seinlin/gerrit,WANdisco/gerrit,Seinlin/gerrit,MerritCR/merrit,pkdevbox/gerrit,quyixia/gerrit,TonyChai24/test,gerrit-review/gerrit,thesamet/gerrit,anminhsu/gerrit,Seinlin/gerrit,basilgor/gerrit,quyixia/gerrit,Seinlin/gerrit,GerritCodeReview/gerrit,dwhipstock/gerrit,midnightradio/gerrit,jackminicloud/test,GerritCodeReview/gerrit,thinkernel/gerrit,thinkernel/gerrit,hdost/gerrit,anminhsu/gerrit,renchaorevee/gerrit,qtproject/qtqa-gerrit,hdost/gerrit,gcoders/gerrit,Saulis/gerrit,MerritCR/merrit,midnightradio/gerrit,netroby/gerrit,Distrotech/gerrit,TonyChai24/test,hdost/gerrit,Seinlin/gerrit,ckamm/gerrit,gerrit-review/gerrit,qtproject/qtqa-gerrit,dwhipstock/gerrit,Team-OctOS/host_gerrit,anminhsu/gerrit,WANdisco/gerrit,dwhipstock/gerrit,MerritCR/merrit,Seinlin/gerrit,zommarin/gerrit,anminhsu/gerrit,renchaorevee/gerrit,netroby/gerrit,bpollack/gerrit,Team-OctOS/host_gerrit,TonyChai24/test,supriyantomaftuh/gerrit,renchaorevee/gerrit,Overruler/gerrit,Overruler/gerrit,gcoders/gerrit,quyixia/gerrit,MerritCR/merrit,supriyantomaftuh/gerrit,supriyantomaftuh/gerrit,gerrit-review/gerrit,GerritCodeReview/gerrit,quyixia/gerrit,basilgor/gerrit,Team-OctOS/host_gerrit,WANdisco/gerrit,dwhipstock/gerrit,thinkernel/gerrit,joshuawilson/merrit,quyixia/gerrit,Saulis/gerrit,thesamet/gerrit,gerrit-review/gerrit,zommarin/gerrit,ckamm/gerrit,gcoders/gerrit,anminhsu/gerrit,thinkernel/gerrit,Saulis/gerrit,TonyChai24/test,Overruler/gerrit,WANdisco/gerrit,bootstraponline-archive/gerrit-mirror,hdost/gerrit,MerritCR/merrit,anminhsu/gerrit,TonyChai24/test,gracefullife/gerrit,midnightradio/gerrit,Overruler/gerrit,WANdisco/gerrit,Saulis/gerrit,MerritCR/merrit,gracefullife/gerrit