if reset fails, display the command that failed
if reset fails, display the command that failed

we get failures in _reset_databases from time to time, and it's
hard to debug without understanding what command failed. Make
this show up in the assert message.

Now with even more output!

Change-Id: Ie82109cfb1745e7218e0906764db1fad0c8fc5f5

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