Add "new in" tags to docs for new Icehouse settings
Add "new in" tags to docs for new Icehouse settings

Also re-alphabetize settings list

Change-Id: Ieb47e9f2a0be4906a744970a9d17dd5177e59fc0
Partial-Bug: #1300710

ChameleonCloud/horizon,kfox1111/horizon,promptworks/horizon,orbitfp7/horizon,coreycb/horizon,froyobin/horizon,damien-dg/horizon,maestro-hybrid-cloud/horizon,orbitfp7/horizon,wolverineav/horizon,wangxiangyu/horizon,mandeepdhami/horizon,takeshineshiro/horizon,RudoCris/horizon,henaras/horizon,NCI-Cloud/horizon,endorphinl/horizon,mrunge/openstack_horizon,davidcusatis/horizon,icloudrnd/automation_tools,wolverineav/horizon,flochaz/horizon,gerrive/horizon,zouyapeng/horizon,openstack/horizon,yjxtogo/horizon,davidcusatis/horizon,mdavid/horizon,icloudrnd/automation_tools,xme1226/horizon,endorphinl/horizon-fork,tsufiev/horizon,NeCTAR-RC/horizon,Metaswitch/horizon,dan1/horizon-proto,Daniex/horizon,bac/horizon,Mirantis/mos-horizon,JioCloud/horizon,CiscoSystems/horizon,Daniex/horizon,FNST-OpenStack/horizon,davidcusatis/horizon,Tesora/tesora-horizon,xinwu/horizon,philoniare/horizon,newrocknj/horizon,luhanhan/horizon,CiscoSystems/avos,takeshineshiro/horizon,Dark-Hacker/horizon,anthonydillon/horizon,pranavtendolkr/horizon,eayunstack/horizon,karthik-suresh/horizon,philoniare/horizon,bigswitch/horizon,wangxiangyu/horizon,nvoron23/avos,tellesnobrega/horizon,CiscoSystems/avos,mrunge/openstack_horizon,takeshineshiro/horizon,blueboxgroup/horizon,redhat-openstack/horizon,zouyapeng/horizon,watonyweng/horizon,yeming233/horizon,tsufiev/horizon,Hodorable/0602,RudoCris/horizon,Hodorable/0602,BiznetGIO/horizon,xme1226/horizon,BiznetGIO/horizon,JioCloud/horizon,icloudrnd/automation_tools,philoniare/horizon,orbitfp7/horizon,BiznetGIO/horizon,VaneCloud/horizon,django-leonardo/horizon,agileblaze/OpenStackTwoFactorAuthentication,flochaz/horizon,yeming233/horizon,watonyweng/horizon,karthik-suresh/horizon,noironetworks/horizon,j4/horizon,luhanhan/horizon,redhat-cip/horizon,j4/horizon,kfox1111/horizon,dan1/horizon-x509,karthik-suresh/horizon,CiscoSystems/avos,newrocknj/horizon,endorphinl/horizon-fork,mrunge/openstack_horizon,django-leonardo/horizon,VaneCloud/horizon,liyitest/rr,davidcusatis/horizon,liyitest/rr,maestro-hybrid-cloud/horizon,Tesora/tesora-horizon,NCI-Cloud/horizon,ChameleonCloud/horizon,luhanhan/horizon,promptworks/horizon,bigswitch/horizon,sandvine/horizon,redhat-cip/horizon,mdavid/horizon,newrocknj/horizon,Mirantis/mos-horizon,tqtran7/horizon,doug-fish/horizon,Dark-Hacker/horizon,xinwu/horizon,agileblaze/OpenStackTwoFactorAuthentication,gerrive/horizon,dan1/horizon-x509,NeCTAR-RC/horizon,zouyapeng/horizon,aaronorosen/horizon-congress,tsufiev/horizon,xme1226/horizon,mandeepdhami/horizon,ging/horizon,blueboxgroup/horizon,Solinea/horizon,CiscoSystems/avos,aaronorosen/horizon-congress,froyobin/horizon,bigswitch/horizon,sandvine/horizon,mrunge/horizon_lib,henaras/horizon,promptworks/horizon,Daniex/horizon,sandvine/horizon,doug-fish/horizon,ging/horizon,anthonydillon/horizon,maestro-hybrid-cloud/horizon,FNST-OpenStack/horizon,blueboxgroup/horizon,luhanhan/horizon,Tesora/tesora-horizon,kfox1111/horizon,promptworks/horizon,nvoron23/avos,nvoron23/avos,saydulk/horizon,mdavid/horizon,froyobin/horizon,redhat-openstack/horizon,yjxtogo/horizon,dan1/horizon-proto,coreycb/horizon,saydulk/horizon,endorphinl/horizon,doug-fish/horizon,mrunge/horizon,wangxiangyu/horizon,NeCTAR-RC/horizon,idjaw/horizon,flochaz/horizon,j4/horizon,NCI-Cloud/horizon,xinwu/horizon,Mirantis/mos-horizon,vladryk/horizon,kfox1111/horizon,icloudrnd/automation_tools,mrunge/horizon,flochaz/horizon,agileblaze/OpenStackTwoFactorAuthentication,saydulk/horizon,bac/horizon,xinwu/horizon,tellesnobrega/horizon,doug-fish/horizon,RudoCris/horizon,zouyapeng/horizon,FNST-OpenStack/horizon,endorphinl/horizon-fork,redhat-cip/horizon,endorphinl/horizon,ging/horizon,Hodorable/0602,vladryk/horizon,mandeepdhami/horizon,Metaswitch/horizon,Hodorable/0602,VaneCloud/horizon,agileblaze/OpenStackTwoFactorAuthentication,watonyweng/horizon,eayunstack/horizon,idjaw/horizon,bigswitch/horizon,maestro-hybrid-cloud/horizon,openstack/horizon,BiznetGIO/horizon,tqtran7/horizon,bac/horizon,mrunge/horizon_lib,tsufiev/horizon,CiscoSystems/horizon,dan1/horizon-x509,Tesora/tesora-horizon,damien-dg/horizon,mrunge/horizon_lib,pranavtendolkr/horizon,damien-dg/horizon,Solinea/horizon,wangxiangyu/horizon,takeshineshiro/horizon,nvoron23/avos,NCI-Cloud/horizon,dan1/horizon-proto,mdavid/horizon,CiscoSystems/horizon,Dark-Hacker/horizon,JioCloud/horizon,watonyweng/horizon,eayunstack/horizon,ChameleonCloud/horizon,yeming233/horizon,gerrive/horizon,newrocknj/horizon,yjxtogo/horizon,noironetworks/horizon,ging/horizon,j4/horizon,redhat-openstack/horizon,noironetworks/horizon,django-leonardo/horizon,izadorozhna/dashboard_integration_tests,CiscoSystems/horizon,aaronorosen/horizon-congress,dan1/horizon-x509,idjaw/horizon,Dark-Hacker/horizon,pranavtendolkr/horizon,philoniare/horizon,redhat-openstack/horizon,liyitest/rr,sandvine/horizon,henaras/horizon,idjaw/horizon,coreycb/horizon,vladryk/horizon,endorphinl/horizon-fork,karthik-suresh/horizon,yjxtogo/horizon,openstack/horizon,RudoCris/horizon,Metaswitch/horizon,tellesnobrega/horizon,ChameleonCloud/horizon,vladryk/horizon,mandeepdhami/horizon,yeming233/horizon,coreycb/horizon,mrunge/horizon,FNST-OpenStack/horizon,openstack/horizon,wolverineav/horizon,anthonydillon/horizon,gerrive/horizon,dan1/horizon-proto,liyitest/rr,pranavtendolkr/horizon,VaneCloud/horizon,tqtran7/horizon,henaras/horizon,redhat-cip/horizon,endorphinl/horizon,tellesnobrega/horizon,django-leonardo/horizon,NeCTAR-RC/horizon,izadorozhna/dashboard_integration_tests,tqtran7/horizon,saydulk/horizon,Daniex/horizon,Solinea/horizon,Mirantis/mos-horizon,anthonydillon/horizon,noironetworks/horizon,blueboxgroup/horizon,Metaswitch/horizon,damien-dg/horizon,orbitfp7/horizon,Solinea/horizon,bac/horizon,wolverineav/horizon