Indicate whether service is down for mc driver
Indicate whether service is down for mc driver

memcache driver for service didn't log any clue
whether the service is down or not. This patch add a
log to indicate it at DEBUG level.

Closes-Bug: #1382564

Change-Id: I05e12b56411f4475d1ef50e90e09abf75d7355b0

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