Add some more comments to _get_my_ip().
Add some more comments to _get_my_ip().

bug 930513.

This patch adds some additional comments to _get_my_ip() to try to make
the code a bit more clear and to clarify that no traffic is actually
sent out by this code.

Change-Id: I6f8d4a0a51596e5c531da53f3c79c5bffca59b39

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