Rework run_autotest.sh to support server side control files.
Rework run_autotest.sh to support server side control files.

The idea here is to remove flag processing inside this wrapper script and pass on all flags into autoserv.

I've tested with server/site_tests/system_BootPerfServer and a client side tests.

Both work fine.

Review URL: http://codereview.chromium.org/536081

nicescale/scripts,gtank/scripts,trnubo/scripts,crawford/scripts,smilart/scripts,sigma/coreos-scripts,endocode/scripts,bcwaldon/coreos-scripts,mjg59/scripts,crawford/scripts,andrejro/coreos--scripts,mischief/scripts,nicescale/scripts,zhang0137/scripts,gtank/scripts,marineam/coreos-scripts,marineam/coreos-scripts,andrejro/coreos--scripts,zhang0137/scripts,BugRoger/scripts,fivethreeo/scripts,sigma/coreos-scripts,smilart/scripts,nicescale/scripts,BugRoger/scripts,sigma/coreos-scripts,fivethreeo/scripts,bcwaldon/coreos-scripts,BugRoger/scripts,trnubo/scripts,mjg59/scripts,marineam/coreos-scripts,glevand/coreos--scripts,coreos/scripts,mischief/scripts,vmware/coreos-scripts,glevand/coreos--scripts,mjg59/scripts,fivethreeo/scripts,gtank/scripts,andrejro/coreos--scripts,bcwaldon/coreos-scripts,vmware/coreos-scripts,endocode/scripts,zhang0137/scripts,mischief/scripts,smilart/scripts,endocode/scripts,coreos/scripts,crawford/scripts,vmware/coreos-scripts,trnubo/scripts