Clean up settings.py.
Clean up settings.py.

Removes unused contrib apps, alphabatize context processors, put nose
tests back

netscaler/horizon,orbitfp7/horizon,r-icarus/openstack_microserver,1ukash/horizon,1ukash/horizon,Daniex/horizon,nvoron23/avos,rdo-management/tuskar-ui,mandeepdhami/horizon,promptworks/horizon,watonyweng/horizon,ohnoimdead/horizon,promptworks/horizon,gochist/horizon,gochist/horizon,icloudrnd/automation_tools,vladryk/horizon,tsufiev/horizon,rdo-management/tuskar-ui,coreycb/horizon,cloud-smokers/openstack-dashboard,j4/horizon,xme1226/horizon,tqtran7/horizon,damien-dg/horizon,FNST-OpenStack/horizon,mrunge/horizon_lib,mrunge/horizon,zouyapeng/horizon,froyobin/horizon,redhat-cip/horizon,mrunge/openstack_horizon,Metaswitch/horizon,aaronorosen/horizon-congress,ttrifonov/horizon,yjxtogo/horizon,opencloudconsortium/tukey-portal,Tesora/tesora-horizon,tuskar/tuskar-ui,tanglei528/horizon,mdavid/horizon,ging/horizon,ikargis/horizon_fod,rickerc/horizon_audit,Metaswitch/horizon,tanglei528/horizon,aaronorosen/horizon-congress,pranavtendolkr/horizon,maestro-hybrid-cloud/horizon,ohnoimdead/horizon,ttrifonov/horizon,JioCloud/horizon,doug-fish/horizon,sandvine/horizon,FNST-OpenStack/horizon,FNST-OpenStack/horizon,vladryk/horizon,Solinea/horizon,gerrive/horizon,aaronorosen/horizon-congress,CiscoSystems/horizon,sandvine/horizon,dan1/horizon-proto,agileblaze/OpenStackTwoFactorAuthentication,openstack/horizon,flochaz/horizon,CiscoSystems/avos,ntt-pf-lab/openstack-dashboard,endorphinl/horizon,bac/horizon,henaras/horizon,promptworks/horizon,endorphinl/horizon,mrunge/openstack_horizon,takeshineshiro/horizon,mdavid/horizon,yanheven/console,Dark-Hacker/horizon,vladryk/horizon,liyitest/rr,noironetworks/horizon,noironetworks/horizon,philoniare/horizon,yeming233/horizon,CiscoSystems/openstack-dashboard,mrunge/openstack_horizon,vbannai/disk-qos-horizon,eayunstack/horizon,saydulk/horizon,LabAdvComp/tukey_portal,bac/horizon,gerrive/horizon,griddynamics/osc-robot-openstack-dashboard,watonyweng/horizon,endorphinl/horizon-fork,Metaswitch/horizon,kaiweifan/horizon,davidcusatis/horizon,openstack-ja/horizon,usc-isi/horizon-old,mrunge/horizon_lib,orbitfp7/horizon,davidcusatis/horizon,Dark-Hacker/horizon,saydulk/horizon,takeshineshiro/horizon,newrocknj/horizon,anthonydillon/horizon,kfox1111/horizon,henaras/horizon,Hodorable/0602,dan1/horizon-x509,occ-data/tukey-portal,BiznetGIO/horizon,j4/horizon,Tesora/tesora-horizon,izadorozhna/dashboard_integration_tests,opencloudconsortium/tukey-portal,dan1/horizon-proto,ChameleonCloud/horizon,Daniex/horizon,Solinea/horizon,CiscoSystems/avos,redhat-openstack/horizon,karthik-suresh/horizon,flochaz/horizon,ikargis/horizon_fod,philoniare/horizon,netscaler/horizon,asomya/test,luhanhan/horizon,tqtran7/horizon,tqtran7/horizon,citrix-openstack/horizon,kaiweifan/horizon,pnavarro/openstack-dashboard,doug-fish/horizon,nvoron23/avos,usc-isi/horizon-old,zouyapeng/horizon,bac/horizon,eayunstack/horizon,zouyapeng/horizon,redhat-cip/horizon,developerworks/horizon,tellesnobrega/horizon,tuskar/tuskar-ui,Hodorable/0602,citrix-openstack-build/horizon,VaneCloud/horizon,wangxiangyu/horizon,griddynamics/osc-robot-openstack-dashboard,LabAdvComp/tukey_portal,anthonydillon/horizon,vladryk/horizon,tsufiev/horizon,openstack-ja/horizon,redhat-openstack/horizon,FNST-OpenStack/horizon,occ-data/tukey-portal,tuskar/tuskar-ui,liyitest/rr,henaras/horizon,Daniex/horizon,mdavid/horizon,NeCTAR-RC/horizon,orbitfp7/horizon,tellesnobrega/horizon,j4/horizon,takeshineshiro/horizon,vbannai/disk-qos-horizon,gerrive/horizon,spring-week-topos/horizon-week,tanglei528/horizon,ging/horizon,agileblaze/OpenStackTwoFactorAuthentication,damien-dg/horizon,openstack/horizon,blueboxgroup/horizon,karthik-suresh/horizon,xme1226/horizon,saydulk/horizon,rickerc/horizon_audit,r-icarus/openstack_microserver,citrix-openstack-build/horizon,wolverineav/horizon,yeming233/horizon,coreycb/horizon,pranavtendolkr/horizon,openstack-ja/horizon,saydulk/horizon,ntt-pf-lab/horizon,mandeepdhami/horizon,kfox1111/horizon,nvoron23/avos,watonyweng/horizon,Mirantis/mos-horizon,ohnoimdead/horizon,Dark-Hacker/horizon,Frostman/eho-horizon,newrocknj/horizon,icloudrnd/automation_tools,NCI-Cloud/horizon,ChameleonCloud/horizon,maestro-hybrid-cloud/horizon,tellesnobrega/horizon,pnavarro/openstack-dashboard,damien-dg/horizon,Frostman/eho-horizon,bac/horizon,Tesora/tesora-horizon,newrocknj/horizon,cloud-smokers/openstack-dashboard,redhat-openstack/horizon,sandvine/horizon,ikargis/horizon_fod,philoniare/horizon,redhat-cip/horizon,sandvine/horizon,zen/openstack-dashboard,RudoCris/horizon,Hodorable/0602,99cloud/keystone_register,idjaw/horizon,izadorozhna/dashboard_integration_tests,Mirantis/mos-horizon,froyobin/horizon,blueboxgroup/horizon,kfox1111/horizon,xinwu/horizon,ChameleonCloud/horizon,ChameleonCloud/horizon,Daniex/horizon,opencloudconsortium/tukey-portal,asomya/test,xme1226/horizon,CiscoSystems/avos,1ukash/horizon,JioCloud/horizon,RudoCris/horizon,karthik-suresh/horizon,Frostman/eho-horizon,tqtran7/horizon,davidcusatis/horizon,griddynamics/osc-robot-openstack-dashboard,NeCTAR-RC/horizon,NeCTAR-RC/horizon,yeming233/horizon,xinwu/horizon,endorphinl/horizon,endorphinl/horizon-fork,CiscoSystems/horizon,dan1/horizon-x509,RudoCris/horizon,citrix-openstack/horizon,agileblaze/OpenStackTwoFactorAuthentication,Solinea/horizon,dan1/horizon-proto,cloud-smokers/openstack-dashboard,pnavarro/openstack-dashboard,kaiweifan/horizon,xinwu/horizon,Tesora/tesora-horizon,rdo-management/tuskar-ui,doug-fish/horizon,occ-data/tukey-portal,dan1/horizon-x509,Mirantis/mos-horizon,vbannai/disk-qos-horizon,usc-isi/horizon-old,CiscoSystems/avos,savi-dev/horizon,CiscoSystems/horizon,endorphinl/horizon-fork,flochaz/horizon,anthonydillon/horizon,zen/openstack-dashboard,mrunge/horizon,99cloud/keystone_register,henaras/horizon,developerworks/horizon,spring-week-topos/horizon-week,doug-fish/horizon,takeshineshiro/horizon,promptworks/horizon,openstack/horizon,luhanhan/horizon,openstack/horizon,ntt-pf-lab/openstack-dashboard,asomya/test,pranavtendolkr/horizon,netscaler/horizon,icloudrnd/automation_tools,wolverineav/horizon,rdo-management/tuskar-ui,dan1/horizon-x509,django-leonardo/horizon,ging/horizon,watonyweng/horizon,citrix-openstack-build/horizon,zouyapeng/horizon,NCI-Cloud/horizon,savi-dev/horizon,LabAdvComp/tukey_portal,yanheven/console,icloudrnd/automation_tools,spring-week-topos/horizon-week,Mirantis/mos-horizon,froyobin/horizon,BiznetGIO/horizon,Hodorable/0602,CiscoSystems/horizon,newrocknj/horizon,davidcusatis/horizon,yjxtogo/horizon,wangxiangyu/horizon,endorphinl/horizon,coreycb/horizon,xinwu/horizon,tsufiev/horizon,zen/openstack-dashboard,mdavid/horizon,gochist/horizon,orbitfp7/horizon,wangxiangyu/horizon,BiznetGIO/horizon,damien-dg/horizon,ttrifonov/horizon,anthonydillon/horizon,BiznetGIO/horizon,idjaw/horizon,liyitest/rr,wolverineav/horizon,savi-dev/horizon,bigswitch/horizon,mrunge/horizon,luhanhan/horizon,noironetworks/horizon,VaneCloud/horizon,maestro-hybrid-cloud/horizon,mrunge/horizon_lib,ging/horizon,agileblaze/OpenStackTwoFactorAuthentication,Dark-Hacker/horizon,yjxtogo/horizon,ntt-pf-lab/openstack-dashboard,wangxiangyu/horizon,VaneCloud/horizon,ntt-pf-lab/horizon,Solinea/horizon,r-icarus/openstack_microserver,CiscoSystems/openstack-dashboard,maestro-hybrid-cloud/horizon,CiscoSystems/openstack-dashboard,j4/horizon,redhat-cip/horizon,idjaw/horizon,NCI-Cloud/horizon,mandeepdhami/horizon,developerworks/horizon,VaneCloud/horizon,bigswitch/horizon,mandeepdhami/horizon,nvoron23/avos,endorphinl/horizon-fork,LabAdvComp/tukey_portal,wolverineav/horizon,redhat-openstack/horizon,luhanhan/horizon,rickerc/horizon_audit,django-leonardo/horizon,idjaw/horizon,NeCTAR-RC/horizon,dan1/horizon-proto,django-leonardo/horizon,coreycb/horizon,django-leonardo/horizon,99cloud/keystone_register,blueboxgroup/horizon,eayunstack/horizon,citrix-openstack/horizon,gerrive/horizon,karthik-suresh/horizon,Metaswitch/horizon,JioCloud/horizon,yeming233/horizon,bigswitch/horizon,flochaz/horizon,yanheven/console,liyitest/rr,pranavtendolkr/horizon,NCI-Cloud/horizon,RudoCris/horizon,blueboxgroup/horizon,kfox1111/horizon,tsufiev/horizon,yjxtogo/horizon,ntt-pf-lab/horizon,noironetworks/horizon,bigswitch/horizon,tellesnobrega/horizon,philoniare/horizon