Fix $this usage in horizon.tables.js
Fix $this usage in horizon.tables.js

In horizon.tables.js there are a couple of places where
$(this) is called multiple times in the same function. This
isn't optimal and is corrected by this patch.

Change-Id: I7c644c3dbf96c2958ec351024d7f37a30448c44e
Closes-Bug: 1463501

karthik-suresh/horizon,doug-fish/horizon,dan1/horizon-proto,BiznetGIO/horizon,openstack/horizon,karthik-suresh/horizon,j4/horizon,j4/horizon,philoniare/horizon,coreycb/horizon,doug-fish/horizon,maestro-hybrid-cloud/horizon,vladryk/horizon,Dark-Hacker/horizon,saydulk/horizon,redhat-openstack/horizon,tqtran7/horizon,dan1/horizon-proto,mandeepdhami/horizon,bac/horizon,bigswitch/horizon,gerrive/horizon,Tesora/tesora-horizon,watonyweng/horizon,openstack/horizon,noironetworks/horizon,Solinea/horizon,openstack/horizon,sandvine/horizon,redhat-cip/horizon,BiznetGIO/horizon,dan1/horizon-proto,damien-dg/horizon,endorphinl/horizon-fork,davidcusatis/horizon,anthonydillon/horizon,Metaswitch/horizon,saydulk/horizon,gerrive/horizon,mdavid/horizon,NeCTAR-RC/horizon,redhat-cip/horizon,saydulk/horizon,ChameleonCloud/horizon,Tesora/tesora-horizon,sandvine/horizon,Metaswitch/horizon,idjaw/horizon,wolverineav/horizon,endorphinl/horizon,newrocknj/horizon,karthik-suresh/horizon,luhanhan/horizon,Dark-Hacker/horizon,endorphinl/horizon,anthonydillon/horizon,watonyweng/horizon,maestro-hybrid-cloud/horizon,mandeepdhami/horizon,endorphinl/horizon-fork,Mirantis/mos-horizon,xinwu/horizon,dan1/horizon-x509,RudoCris/horizon,redhat-cip/horizon,newrocknj/horizon,anthonydillon/horizon,tellesnobrega/horizon,django-leonardo/horizon,ChameleonCloud/horizon,Solinea/horizon,endorphinl/horizon-fork,mandeepdhami/horizon,yeming233/horizon,tellesnobrega/horizon,karthik-suresh/horizon,noironetworks/horizon,endorphinl/horizon,idjaw/horizon,NeCTAR-RC/horizon,Tesora/tesora-horizon,bigswitch/horizon,FNST-OpenStack/horizon,takeshineshiro/horizon,philoniare/horizon,wolverineav/horizon,FNST-OpenStack/horizon,xinwu/horizon,davidcusatis/horizon,saydulk/horizon,davidcusatis/horizon,noironetworks/horizon,Mirantis/mos-horizon,yjxtogo/horizon,maestro-hybrid-cloud/horizon,idjaw/horizon,coreycb/horizon,luhanhan/horizon,damien-dg/horizon,henaras/horizon,endorphinl/horizon,newrocknj/horizon,dan1/horizon-x509,doug-fish/horizon,endorphinl/horizon-fork,gerrive/horizon,Tesora/tesora-horizon,BiznetGIO/horizon,damien-dg/horizon,openstack/horizon,mdavid/horizon,tqtran7/horizon,bac/horizon,j4/horizon,dan1/horizon-proto,philoniare/horizon,dan1/horizon-x509,Metaswitch/horizon,tellesnobrega/horizon,django-leonardo/horizon,noironetworks/horizon,redhat-openstack/horizon,j4/horizon,anthonydillon/horizon,vladryk/horizon,coreycb/horizon,yjxtogo/horizon,doug-fish/horizon,sandvine/horizon,Solinea/horizon,RudoCris/horizon,philoniare/horizon,redhat-openstack/horizon,bigswitch/horizon,BiznetGIO/horizon,mandeepdhami/horizon,yjxtogo/horizon,Metaswitch/horizon,henaras/horizon,wolverineav/horizon,idjaw/horizon,mdavid/horizon,takeshineshiro/horizon,takeshineshiro/horizon,luhanhan/horizon,watonyweng/horizon,xinwu/horizon,Dark-Hacker/horizon,henaras/horizon,watonyweng/horizon,django-leonardo/horizon,yeming233/horizon,ChameleonCloud/horizon,damien-dg/horizon,vladryk/horizon,NeCTAR-RC/horizon,sandvine/horizon,yjxtogo/horizon,FNST-OpenStack/horizon,tqtran7/horizon,wolverineav/horizon,yeming233/horizon,RudoCris/horizon,luhanhan/horizon,FNST-OpenStack/horizon,bigswitch/horizon,gerrive/horizon,bac/horizon,Solinea/horizon,mdavid/horizon,xinwu/horizon,dan1/horizon-x509,tellesnobrega/horizon,Dark-Hacker/horizon,coreycb/horizon,henaras/horizon,django-leonardo/horizon,redhat-cip/horizon,tqtran7/horizon,newrocknj/horizon,Mirantis/mos-horizon,NeCTAR-RC/horizon,bac/horizon,Mirantis/mos-horizon,davidcusatis/horizon,vladryk/horizon,ChameleonCloud/horizon,maestro-hybrid-cloud/horizon,redhat-openstack/horizon,takeshineshiro/horizon,yeming233/horizon,RudoCris/horizon