Fix error when tagging objects with null / nil name attribute
Fix error when tagging objects with null / nil name attribute

This is to fix the following error:

FATAL -- : Error caught: [ArgumentError] comparison of NilClass with
String failed
app/controllers/application_controller/tags.rb:350:in `sort_by'
app/controllers/application_controller/tags.rb:350:in
`tag_edit_build_screen'
app/controllers/application_controller/tags.rb:172:in
`tagging_tags_set_form_vars'
app/controllers/application_controller/tags.rb:152:in
`tagging_edit_tags_reset'
app/controllers/application_controller/tags.rb:15:in `tagging_edit'
...

https://bugzilla.redhat.com/show_bug.cgi?id=1339170

tinaafitz/manageiq,josejulio/manageiq,matobet/manageiq,yaacov/manageiq,jvlcek/manageiq,NaNi-Z/manageiq,andyvesel/manageiq,lpichler/manageiq,romaintb/manageiq,mkanoor/manageiq,maas-ufcg/manageiq,pkomanek/manageiq,djberg96/manageiq,aufi/manageiq,ailisp/manageiq,tinaafitz/manageiq,pkomanek/manageiq,tzumainn/manageiq,tzumainn/manageiq,mfeifer/manageiq,romanblanco/manageiq,djberg96/manageiq,mzazrivec/manageiq,mzazrivec/manageiq,gmcculloug/manageiq,syncrou/manageiq,juliancheal/manageiq,tinaafitz/manageiq,kbrock/manageiq,aufi/manageiq,fbladilo/manageiq,d-m-u/manageiq,maas-ufcg/manageiq,jrafanie/manageiq,ManageIQ/manageiq,maas-ufcg/manageiq,chessbyte/manageiq,mresti/manageiq,mresti/manageiq,hstastna/manageiq,borod108/manageiq,NickLaMuro/manageiq,juliancheal/manageiq,billfitzgerald0120/manageiq,NickLaMuro/manageiq,ilackarms/manageiq,borod108/manageiq,skateman/manageiq,aufi/manageiq,NaNi-Z/manageiq,romaintb/manageiq,KevinLoiseau/manageiq,branic/manageiq,chessbyte/manageiq,durandom/manageiq,jrafanie/manageiq,romaintb/manageiq,gmcculloug/manageiq,romanblanco/manageiq,mresti/manageiq,israel-hdez/manageiq,KevinLoiseau/manageiq,syncrou/manageiq,agrare/manageiq,KevinLoiseau/manageiq,israel-hdez/manageiq,jvlcek/manageiq,skateman/manageiq,kbrock/manageiq,jntullo/manageiq,jameswnl/manageiq,ilackarms/manageiq,skateman/manageiq,gmcculloug/manageiq,gerikis/manageiq,hstastna/manageiq,mzazrivec/manageiq,jntullo/manageiq,agrare/manageiq,billfitzgerald0120/manageiq,maas-ufcg/manageiq,romaintb/manageiq,branic/manageiq,ManageIQ/manageiq,israel-hdez/manageiq,yaacov/manageiq,matobet/manageiq,syncrou/manageiq,jameswnl/manageiq,matobet/manageiq,durandom/manageiq,andyvesel/manageiq,mzazrivec/manageiq,juliancheal/manageiq,yaacov/manageiq,jameswnl/manageiq,d-m-u/manageiq,romanblanco/manageiq,d-m-u/manageiq,jvlcek/manageiq,djberg96/manageiq,mfeifer/manageiq,josejulio/manageiq,jvlcek/manageiq,jrafanie/manageiq,gerikis/manageiq,KevinLoiseau/manageiq,NickLaMuro/manageiq,gerikis/manageiq,mfeifer/manageiq,hstastna/manageiq,jntullo/manageiq,fbladilo/manageiq,ailisp/manageiq,ManageIQ/manageiq,gerikis/manageiq,branic/manageiq,NaNi-Z/manageiq,andyvesel/manageiq,juliancheal/manageiq,kbrock/manageiq,ilackarms/manageiq,d-m-u/manageiq,branic/manageiq,romaintb/manageiq,mfeifer/manageiq,KevinLoiseau/manageiq,aufi/manageiq,durandom/manageiq,durandom/manageiq,fbladilo/manageiq,maas-ufcg/manageiq,chessbyte/manageiq,matobet/manageiq,andyvesel/manageiq,chessbyte/manageiq,pkomanek/manageiq,skateman/manageiq,mresti/manageiq,fbladilo/manageiq,romanblanco/manageiq,ManageIQ/manageiq,mkanoor/manageiq,yaacov/manageiq,gmcculloug/manageiq,syncrou/manageiq,romaintb/manageiq,lpichler/manageiq,lpichler/manageiq,josejulio/manageiq,mkanoor/manageiq,maas-ufcg/manageiq,jrafanie/manageiq,tzumainn/manageiq,ailisp/manageiq,NaNi-Z/manageiq,ailisp/manageiq,agrare/manageiq,tinaafitz/manageiq,djberg96/manageiq,hstastna/manageiq,KevinLoiseau/manageiq,tzumainn/manageiq,billfitzgerald0120/manageiq,josejulio/manageiq,jameswnl/manageiq,pkomanek/manageiq,NickLaMuro/manageiq,israel-hdez/manageiq,borod108/manageiq,kbrock/manageiq,ilackarms/manageiq,mkanoor/manageiq,billfitzgerald0120/manageiq,borod108/manageiq,jntullo/manageiq,agrare/manageiq,lpichler/manageiq