VMware: clean up get_network_with_the_name
VMware: clean up get_network_with_the_name

By default the method returns None. No need to do this explicitly.

Change-Id: Ie18300bdfaaec8d9c813352fe42a2aebec730c45

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