Revert "Run Documentation formatting in parallel"
Revert "Run Documentation formatting in parallel"

This reverts commit db4e14f1a8d0a0aa0b4b39ac74242ac0962e7f47.
Running AsciiDoc in parallel swamps some hardware, and there
is no portable way to get the number of available cores.

Since it is apparent the contributors want to keep using
Maven, lets just go with correct and slow.

Change-Id: I71c2c902dc1553b0316c21aaf48b481ffe0aaec6

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