Adds LOG statements in multiprocess API test
Adds LOG statements in multiprocess API test

Renames _terminate_workers() to _wait_for_workers_to_end() to accurately
match what is done in that method. Adds a bunch of LOG.info() and
LOG.warn() calls in the various methods in the test to get better
debugging information when bug # 1357578 rears its ugly head.

Change-Id: I6698b7c71ec651c812138c8dd93b1e1b33ee1178
Related-bug: #1357578

nikesh-mahalka/nova,edulramirez/nova,felixma/nova,barnsnake351/nova,CCI-MOC/nova,zzicewind/nova,apporc/nova,eayunstack/nova,rajalokan/nova,jianghuaw/nova,zhimin711/nova,badock/nova,blueboxgroup/nova,zhimin711/nova,yosshy/nova,ruslanloman/nova,Juniper/nova,nikesh-mahalka/nova,eayunstack/nova,barnsnake351/nova,gooddata/openstack-nova,rahulunair/nova,JianyuWang/nova,cloudbase/nova,mikalstill/nova,fnordahl/nova,takeshineshiro/nova,j-carpentier/nova,isyippee/nova,angdraug/nova,mgagne/nova,mandeepdhami/nova,isyippee/nova,TwinkleChawla/nova,jeffrey4l/nova,affo/nova,cyx1231st/nova,tangfeixiong/nova,mandeepdhami/nova,iuliat/nova,MountainWei/nova,ruslanloman/nova,devendermishrajio/nova_test_latest,akash1808/nova_test_latest,mahak/nova,devendermishrajio/nova_test_latest,TwinkleChawla/nova,thomasem/nova,silenceli/nova,tudorvio/nova,cernops/nova,hanlind/nova,rahulunair/nova,Tehsmash/nova,apporc/nova,devendermishrajio/nova,NeCTAR-RC/nova,alaski/nova,redhat-openstack/nova,Tehsmash/nova,raildo/nova,gooddata/openstack-nova,kimjaejoong/nova,klmitch/nova,eonpatapon/nova,CloudServer/nova,affo/nova,Juniper/nova,sebrandon1/nova,jeffrey4l/nova,Francis-Liu/animated-broccoli,jianghuaw/nova,CloudServer/nova,alvarolopez/nova,rajalokan/nova,sebrandon1/nova,scripnichenko/nova,berrange/nova,bgxavier/nova,Metaswitch/calico-nova,mahak/nova,gooddata/openstack-nova,Stavitsky/nova,phenoxim/nova,tudorvio/nova,vladikr/nova_drafts,tianweizhang/nova,tealover/nova,iuliat/nova,noironetworks/nova,alexandrucoman/vbox-nova-driver,Metaswitch/calico-nova,Yusuke1987/openstack_template,cyx1231st/nova,vmturbo/nova,rahulunair/nova,cernops/nova,mgagne/nova,adelina-t/nova,j-carpentier/nova,dawnpower/nova,watonyweng/nova,yosshy/nova,sebrandon1/nova,zzicewind/nova,petrutlucian94/nova,klmitch/nova,orbitfp7/nova,silenceli/nova,cloudbase/nova-virtualbox,Juniper/nova,ted-gould/nova,edulramirez/nova,mikalstill/nova,cloudbase/nova,LoHChina/nova,whitepages/nova,LoHChina/nova,orbitfp7/nova,cloudbase/nova-virtualbox,JioCloud/nova,watonyweng/nova,joker946/nova,tangfeixiong/nova,JianyuWang/nova,berrange/nova,devendermishrajio/nova,yatinkumbhare/openstack-nova,kimjaejoong/nova,eonpatapon/nova,vmturbo/nova,shail2810/nova,vmturbo/nova,vladikr/nova_drafts,redhat-openstack/nova,double12gzh/nova,Stavitsky/nova,joker946/nova,petrutlucian94/nova,Yusuke1987/openstack_template,badock/nova,projectcalico/calico-nova,vmturbo/nova,tianweizhang/nova,scripnichenko/nova,cloudbase/nova,rajalokan/nova,mmnelemane/nova,shail2810/nova,CEG-FYP-OpenStack/scheduler,akash1808/nova_test_latest,maelnor/nova,varunarya10/nova_test_latest,JioCloud/nova_test_latest,CEG-FYP-OpenStack/scheduler,akash1808/nova,adelina-t/nova,openstack/nova,BeyondTheClouds/nova,mmnelemane/nova,jianghuaw/nova,blueboxgroup/nova,CCI-MOC/nova,Juniper/nova,ted-gould/nova,phenoxim/nova,klmitch/nova,mikalstill/nova,whitepages/nova,angdraug/nova,rajalokan/nova,dims/nova,hanlind/nova,bigswitch/nova,alvarolopez/nova,mahak/nova,thomasem/nova,dawnpower/nova,hanlind/nova,bgxavier/nova,bigswitch/nova,projectcalico/calico-nova,belmiromoreira/nova,varunarya10/nova_test_latest,alaski/nova,BeyondTheClouds/nova,tealover/nova,jianghuaw/nova,maelnor/nova,felixma/nova,klmitch/nova,fnordahl/nova,yatinkumbhare/openstack-nova,dims/nova,NeCTAR-RC/nova,alexandrucoman/vbox-nova-driver,belmiromoreira/nova,takeshineshiro/nova,noironetworks/nova,BeyondTheClouds/nova,zaina/nova,JioCloud/nova,openstack/nova,double12gzh/nova,gooddata/openstack-nova,raildo/nova,cernops/nova,Francis-Liu/animated-broccoli,zaina/nova,JioCloud/nova_test_latest,akash1808/nova,MountainWei/nova,openstack/nova