Update ubuntu dev env instructions
Update ubuntu dev env instructions

I just set up an environment to run unit tests on Ubuntu and had to install a
couple of additional packages to make it work.  Update the instructions to
reflect that.

Change-Id: I2ceb1b130111991fa1b34b4636b8ece115e54084

eonpatapon/nova,LoHChina/nova,fnordahl/nova,alexandrucoman/vbox-nova-driver,thomasem/nova,affo/nova,spring-week-topos/nova-week,zzicewind/nova,CEG-FYP-OpenStack/scheduler,jeffrey4l/nova,watonyweng/nova,ruslanloman/nova,cyx1231st/nova,scripnichenko/nova,mmnelemane/nova,Metaswitch/calico-nova,tangfeixiong/nova,MountainWei/nova,berrange/nova,alexandrucoman/vbox-nova-driver,Francis-Liu/animated-broccoli,whitepages/nova,ewindisch/nova,vladikr/nova_drafts,CiscoSystems/nova,Juniper/nova,orbitfp7/nova,badock/nova,BeyondTheClouds/nova,cloudbase/nova-virtualbox,CEG-FYP-OpenStack/scheduler,apporc/nova,joker946/nova,openstack/nova,akash1808/nova,saleemjaveds/https-github.com-openstack-nova,NeCTAR-RC/nova,Juniper/nova,jianghuaw/nova,cernops/nova,bigswitch/nova,rahulunair/nova,alaski/nova,nikesh-mahalka/nova,adelina-t/nova,vmturbo/nova,rajalokan/nova,openstack/nova,fnordahl/nova,projectcalico/calico-nova,mahak/nova,yatinkumbhare/openstack-nova,double12gzh/nova,rajalokan/nova,angdraug/nova,jeffrey4l/nova,luogangyi/bcec-nova,iuliat/nova,watonyweng/nova,silenceli/nova,j-carpentier/nova,CCI-MOC/nova,zaina/nova,vmturbo/nova,double12gzh/nova,mahak/nova,raildo/nova,cloudbase/nova,mgagne/nova,viggates/nova,raildo/nova,vmturbo/nova,Yusuke1987/openstack_template,cernops/nova,NeCTAR-RC/nova,blueboxgroup/nova,CloudServer/nova,adelina-t/nova,hanlind/nova,mikalstill/nova,alvarolopez/nova,leilihh/novaha,JianyuWang/nova,badock/nova,mmnelemane/nova,scripnichenko/nova,joker946/nova,CiscoSystems/nova,cyx1231st/nova,TwinkleChawla/nova,dims/nova,edulramirez/nova,sebrandon1/nova,sebrandon1/nova,ted-gould/nova,bgxavier/nova,jianghuaw/nova,gooddata/openstack-nova,eharney/nova,barnsnake351/nova,thomasem/nova,yosshy/nova,tianweizhang/nova,tudorvio/nova,hanlind/nova,mahak/nova,petrutlucian94/nova,rrader/nova-docker-plugin,ted-gould/nova,JioCloud/nova,jianghuaw/nova,LoHChina/nova,varunarya10/nova_test_latest,alvarolopez/nova,zhimin711/nova,akash1808/nova,MountainWei/nova,cloudbase/nova,hanlind/nova,redhat-openstack/nova,JianyuWang/nova,iuliat/nova,TwinkleChawla/nova,viggates/nova,virtualopensystems/nova,shail2810/nova,dawnpower/nova,eayunstack/nova,leilihh/novaha,petrutlucian94/nova,tudorvio/nova,edulramirez/nova,dawnpower/nova,nikesh-mahalka/nova,kimjaejoong/nova,akash1808/nova_test_latest,shahar-stratoscale/nova,cloudbase/nova-virtualbox,belmiromoreira/nova,zhimin711/nova,saleemjaveds/https-github.com-openstack-nova,redhat-openstack/nova,devendermishrajio/nova_test_latest,virtualopensystems/nova,rajalokan/nova,whitepages/nova,kimjaejoong/nova,mikalstill/nova,klmitch/nova,tealover/nova,takeshineshiro/nova,phenoxim/nova,bigswitch/nova,eayunstack/nova,tangfeixiong/nova,noironetworks/nova,klmitch/nova,mikalstill/nova,gooddata/openstack-nova,JioCloud/nova,mandeepdhami/nova,rajalokan/nova,leilihh/nova,cloudbase/nova,tanglei528/nova,jianghuaw/nova,ewindisch/nova,Tehsmash/nova,JioCloud/nova_test_latest,klmitch/nova,barnsnake351/nova,leilihh/nova,maelnor/nova,phenoxim/nova,klmitch/nova,felixma/nova,takeshineshiro/nova,yosshy/nova,openstack/nova,isyippee/nova,alaski/nova,zaina/nova,cernops/nova,apporc/nova,zzicewind/nova,spring-week-topos/nova-week,berrange/nova,eonpatapon/nova,luogangyi/bcec-nova,tianweizhang/nova,Stavitsky/nova,bgxavier/nova,mgagne/nova,Francis-Liu/animated-broccoli,projectcalico/calico-nova,shail2810/nova,Juniper/nova,CCI-MOC/nova,maelnor/nova,ruslanloman/nova,tealover/nova,dims/nova,rahulunair/nova,blueboxgroup/nova,Stavitsky/nova,BeyondTheClouds/nova,felixma/nova,Tehsmash/nova,shahar-stratoscale/nova,j-carpentier/nova,noironetworks/nova,Yusuke1987/openstack_template,sebrandon1/nova,isyippee/nova,Juniper/nova,JioCloud/nova_test_latest,affo/nova,belmiromoreira/nova,varunarya10/nova_test_latest,vmturbo/nova,tanglei528/nova,devendermishrajio/nova_test_latest,mandeepdhami/nova,akash1808/nova_test_latest,devendermishrajio/nova,CloudServer/nova,vladikr/nova_drafts,silenceli/nova,Metaswitch/calico-nova,gooddata/openstack-nova,eharney/nova,rrader/nova-docker-plugin,BeyondTheClouds/nova,devendermishrajio/nova,yatinkumbhare/openstack-nova,gooddata/openstack-nova,rahulunair/nova,orbitfp7/nova,angdraug/nova