Add trove and sahara plugins in docs
Add trove and sahara plugins in docs

Change-Id: I19b285a4ab8c91b7c056438b68e32f4a385a6345

Mirantis/mos-horizon,noironetworks/horizon,NeCTAR-RC/horizon,gerrive/horizon,dan1/horizon-x509,bac/horizon,noironetworks/horizon,noironetworks/horizon,openstack/horizon,redhat-openstack/horizon,yeming233/horizon,bigswitch/horizon,sandvine/horizon,sandvine/horizon,bac/horizon,wolverineav/horizon,wolverineav/horizon,coreycb/horizon,NeCTAR-RC/horizon,django-leonardo/horizon,gerrive/horizon,BiznetGIO/horizon,davidcusatis/horizon,wolverineav/horizon,davidcusatis/horizon,redhat-openstack/horizon,sandvine/horizon,gerrive/horizon,NeCTAR-RC/horizon,bigswitch/horizon,openstack/horizon,davidcusatis/horizon,dan1/horizon-x509,BiznetGIO/horizon,Mirantis/mos-horizon,bac/horizon,noironetworks/horizon,yeming233/horizon,openstack/horizon,yeming233/horizon,ChameleonCloud/horizon,yeming233/horizon,coreycb/horizon,BiznetGIO/horizon,django-leonardo/horizon,wolverineav/horizon,ChameleonCloud/horizon,dan1/horizon-x509,bigswitch/horizon,django-leonardo/horizon,bac/horizon,django-leonardo/horizon,coreycb/horizon,redhat-openstack/horizon,NeCTAR-RC/horizon,davidcusatis/horizon,Mirantis/mos-horizon,ChameleonCloud/horizon,Mirantis/mos-horizon,gerrive/horizon,dan1/horizon-x509,coreycb/horizon,BiznetGIO/horizon,sandvine/horizon,redhat-openstack/horizon,openstack/horizon,bigswitch/horizon,ChameleonCloud/horizon