xml_to_json should not convert xmlns into attribute
xml_to_json should not convert xmlns into attribute

We should not treat xmlns as json payload.

Fixes LP# 1152630

Change-Id: Ib30759d0b6782b70356b4aa057227c01a2306fee

redhat-cip/tempest,flyingfish007/tempest,eggmaster/tempest,Vaidyanath/tempest,LIS/lis-tempest,citrix-openstack/build-tempest,zsoltdudas/lis-tempest,citrix-openstack/build-tempest,FujitsuEnablingSoftwareTechnologyGmbH/tempest,manasi24/jiocloud-tempest-qatempest,akash1808/tempest,Mirantis/tempest,JioCloud/tempest,ntymtsiv/tempest,jaspreetw/tempest,dkalashnik/tempest,sebrandon1/tempest,Juniper/tempest,vedujoshi/tempest,nunogt/tempest,bigswitch/tempest,openstack/tempest,Vaidyanath/tempest,tudorvio/tempest,BeenzSyed/tempest,vmahuli/tempest,rzarzynski/tempest,jamielennox/tempest,itskewpie/tempest,xbezdick/tempest,flyingfish007/tempest,afaheem88/tempest_neutron,CiscoSystems/tempest,cloudbase/lis-tempest,queria/my-tempest,Lilywei123/tempest,ebagdasa/tempest,adkerr/tempest,Juraci/tempest,afaheem88/tempest_neutron,yamt/tempest,pczerkas/tempest,Tesora/tesora-tempest,afaheem88/tempest,hpcloud-mon/tempest,roopali8/tempest,neerja28/Tempest,ebagdasa/tempest,danielmellado/tempest,nunogt/tempest,eggmaster/tempest,manasi24/tempest,citrix-openstack-build/tempest,NexusIS/tempest,tudorvio/tempest,vedujoshi/os_tempest,alinbalutoiu/tempest,itskewpie/tempest,yamt/tempest,masayukig/tempest,vedujoshi/tempest,varunarya10/tempest,hayderimran7/tempest,varunarya10/tempest,rakeshmi/tempest,hayderimran7/tempest,Tesora/tesora-tempest,CiscoSystems/tempest,xbezdick/tempest,pczerkas/tempest,vedujoshi/os_tempest,cloudbase/lis-tempest,tonyli71/tempest,neerja28/Tempest,openstack/tempest,cisco-openstack/tempest,bigswitch/tempest,Lilywei123/tempest,Mirantis/tempest,danielmellado/tempest,LIS/lis-tempest,jaspreetw/tempest,Juniper/tempest,armando-migliaccio/tempest,masayukig/tempest,manasi24/jiocloud-tempest-qatempest,citrix-openstack-build/tempest,ntymtsiv/tempest,afaheem88/tempest,Juraci/tempest,redhat-cip/tempest,FujitsuEnablingSoftwareTechnologyGmbH/tempest,sebrandon1/tempest,pandeyop/tempest,hpcloud-mon/tempest,cisco-openstack/tempest,NexusIS/tempest,jamielennox/tempest,izadorozhna/tempest,izadorozhna/tempest,rzarzynski/tempest,JioCloud/tempest,armando-migliaccio/tempest,alinbalutoiu/tempest,vmahuli/tempest,tonyli71/tempest,roopali8/tempest,manasi24/tempest,pandeyop/tempest,BeenzSyed/tempest,zsoltdudas/lis-tempest,queria/my-tempest,adkerr/tempest,akash1808/tempest,rakeshmi/tempest,dkalashnik/tempest