Tone down logging while waiting for conductor.
Tone down logging while waiting for conductor.

When nova-compute starts, it sits in a loop waiting for nova-conductor
to be responsive, since it is required for nova-compute to be able to
complete its startup process.  If a ping request times out, don't leave
a traceback mess in the log.  This is an expected type of failure that
is handled.  Just leave it as a warning in case the problem really is
that nova-conductor hasn't been started.

Fix bug 1137994.

Change-Id: I0754fbd6faf35a09b8733d3ced77871268abf1e8

vmturbo/nova,BeyondTheClouds/nova,citrix-openstack-build/nova,phenoxim/nova,Triv90/Nova,jeffrey4l/nova,JioCloud/nova_test_latest,watonyweng/nova,viggates/nova,angdraug/nova,devoid/nova,nikesh-mahalka/nova,petrutlucian94/nova_dev,rajalokan/nova,apporc/nova,plumgrid/plumgrid-nova,mahak/nova,shootstar/novatest,adelina-t/nova,cernops/nova,takeshineshiro/nova,bgxavier/nova,thomasem/nova,cloudbase/nova,petrutlucian94/nova_dev,thomasem/nova,tangfeixiong/nova,Yusuke1987/openstack_template,Juniper/nova,ted-gould/nova,luogangyi/bcec-nova,rajalokan/nova,zzicewind/nova,shahar-stratoscale/nova,jianghuaw/nova,cernops/nova,gooddata/openstack-nova,Juniper/nova,mmnelemane/nova,iuliat/nova,petrutlucian94/nova,silenceli/nova,zhimin711/nova,yrobla/nova,dims/nova,affo/nova,DirectXMan12/nova-hacking,dawnpower/nova,ewindisch/nova,zzicewind/nova,barnsnake351/nova,TieWei/nova,bclau/nova,rrader/nova-docker-plugin,dstroppa/openstack-smartos-nova-grizzly,JianyuWang/nova,cyx1231st/nova,gspilio/nova,TwinkleChawla/nova,tanglei528/nova,barnsnake351/nova,akash1808/nova_test_latest,angdraug/nova,BeyondTheClouds/nova,saleemjaveds/https-github.com-openstack-nova,JioCloud/nova_test_latest,devendermishrajio/nova,openstack/nova,zaina/nova,tanglei528/nova,iuliat/nova,gspilio/nova,dims/nova,Yusuke1987/openstack_template,rahulunair/nova,felixma/nova,mgagne/nova,devendermishrajio/nova_test_latest,plumgrid/plumgrid-nova,eharney/nova,SUSE-Cloud/nova,sridevikoushik31/nova,petrutlucian94/nova,tealover/nova,sebrandon1/nova,yatinkumbhare/openstack-nova,DirectXMan12/nova-hacking,redhat-openstack/nova,ntt-sic/nova,eonpatapon/nova,cloudbau/nova,NeCTAR-RC/nova,devendermishrajio/nova,ntt-sic/nova,DirectXMan12/nova-hacking,CiscoSystems/nova,luogangyi/bcec-nova,bigswitch/nova,projectcalico/calico-nova,CCI-MOC/nova,shail2810/nova,tudorvio/nova,badock/nova,tealover/nova,eayunstack/nova,imsplitbit/nova,isyippee/nova,gooddata/openstack-nova,bigswitch/nova,ted-gould/nova,noironetworks/nova,alexandrucoman/vbox-nova-driver,sacharya/nova,sridevikoushik31/openstack,rrader/nova-docker-plugin,joker946/nova,fnordahl/nova,shootstar/novatest,spring-week-topos/nova-week,akash1808/nova_test_latest,CloudServer/nova,NeCTAR-RC/nova,isyippee/nova,mahak/nova,mandeepdhami/nova,double12gzh/nova,CEG-FYP-OpenStack/scheduler,scripnichenko/nova,tudorvio/nova,vmturbo/nova,silenceli/nova,apporc/nova,Triv90/Nova,virtualopensystems/nova,akash1808/nova,JioCloud/nova,alaski/nova,bclau/nova,blueboxgroup/nova,spring-week-topos/nova-week,mikalstill/nova,jianghuaw/nova,TwinkleChawla/nova,whitepages/nova,Triv90/Nova,eonpatapon/nova,scripnichenko/nova,LoHChina/nova,rickerc/nova_audit,sridevikoushik31/openstack,joker946/nova,akash1808/nova,maheshp/novatest,takeshineshiro/nova,ewindisch/nova,yosshy/nova,berrange/nova,phenoxim/nova,Francis-Liu/animated-broccoli,leilihh/nova,klmitch/nova,jianghuaw/nova,virtualopensystems/nova,jeffrey4l/nova,devoid/nova,hanlind/nova,sebrandon1/nova,cernops/nova,vmturbo/nova,yrobla/nova,cloudbau/nova,raildo/nova,Brocade-OpenSource/OpenStack-DNRM-Nova,orbitfp7/nova,badock/nova,zaina/nova,viggates/nova,JianyuWang/nova,mandeepdhami/nova,Metaswitch/calico-nova,raildo/nova,klmitch/nova,devendermishrajio/nova_test_latest,mgagne/nova,maheshp/novatest,leilihh/novaha,projectcalico/calico-nova,cloudbase/nova,dstroppa/openstack-smartos-nova-grizzly,CEG-FYP-OpenStack/scheduler,CiscoSystems/nova,OpenAcademy-OpenStack/nova-scheduler,qwefi/nova,zhimin711/nova,orbitfp7/nova,sridevikoushik31/openstack,vladikr/nova_drafts,citrix-openstack-build/nova,adelina-t/nova,kimjaejoong/nova,Metaswitch/calico-nova,Juniper/nova,Stavitsky/nova,LoHChina/nova,qwefi/nova,blueboxgroup/nova,mahak/nova,belmiromoreira/nova,varunarya10/nova_test_latest,nikesh-mahalka/nova,Juniper/nova,Yuriy-Leonov/nova,dawnpower/nova,cloudbase/nova-virtualbox,kimjaejoong/nova,yosshy/nova,felixma/nova,TieWei/nova,SUSE-Cloud/nova,klmitch/nova,Francis-Liu/animated-broccoli,rickerc/nova_audit,imsplitbit/nova,mikalstill/nova,rahulunair/nova,belmiromoreira/nova,sridevikoushik31/nova,ruslanloman/nova,vmturbo/nova,sridevikoushik31/nova,edulramirez/nova,sridevikoushik31/nova,maelnor/nova,OpenAcademy-OpenStack/nova-scheduler,alvarolopez/nova,rajalokan/nova,j-carpentier/nova,jianghuaw/nova,eharney/nova,redhat-openstack/nova,rahulunair/nova,alexandrucoman/vbox-nova-driver,openstack/nova,fnordahl/nova,gooddata/openstack-nova,Yuriy-Leonov/nova,JioCloud/nova,cloudbase/nova,MountainWei/nova,affo/nova,gooddata/openstack-nova,yrobla/nova,yatinkumbhare/openstack-nova,tangfeixiong/nova,watonyweng/nova,tianweizhang/nova,rajalokan/nova,hanlind/nova,eayunstack/nova,maheshp/novatest,tianweizhang/nova,cloudbase/nova-virtualbox,Stavitsky/nova,BeyondTheClouds/nova,shail2810/nova,cyx1231st/nova,varunarya10/nova_test_latest,CCI-MOC/nova,sacharya/nova,dstroppa/openstack-smartos-nova-grizzly,sebrandon1/nova,openstack/nova,Tehsmash/nova,klmitch/nova,double12gzh/nova,maelnor/nova,edulramirez/nova,Brocade-OpenSource/OpenStack-DNRM-Nova,alaski/nova,mmnelemane/nova,vladikr/nova_drafts,leilihh/novaha,mikalstill/nova,alvarolopez/nova,hanlind/nova,ruslanloman/nova,bgxavier/nova,j-carpentier/nova,berrange/nova,MountainWei/nova,shahar-stratoscale/nova,Tehsmash/nova,saleemjaveds/https-github.com-openstack-nova,noironetworks/nova,CloudServer/nova,gspilio/nova,leilihh/nova,whitepages/nova