Merge pull request #1471 from AparnaKarve/fix_host_listnav

Fix Providers text and Cluster info in host listnav
(cherry picked from commit fa2a46d)

https://bugzilla.redhat.com/show_bug.cgi?id=1460777

app/views/layouts/listnav/_host.html.haml

@@ -72,7 +72,7 @@
       %ul.nav.nav-pills.nav-stacked
         - if role_allows?(:feature => "ems_infra_show") && !@record.ext_management_system.nil?
           %li
-            = link_to("#{ui_lookup(:table => "ext_management_systems")}: #{@record.ext_management_system.name}",
+            = link_to("#{ui_lookup(:table => "ems_infra")}: #{@record.ext_management_system.name}",
               ems_infra_path(@record.ext_management_system),
               :title => _("Show this parent %{provider} for this %{host}") % {:host => host_title, :provider => ui_lookup(:table => "ems_infra")})
 
@@ -83,6 +83,9 @@
               {:controller => "ems_cluster", :action => 'show', :id => @record.ems_cluster.id.to_s},
               :title => _("Show parent %{cluster} for this %{host}") % {:host => host_title, :cluster => cluster_title})
 
+        - if role_allows?(:feature => "ems_cluster_show") && @record.ems_cluster.nil?
+          = li_link(:if => false, :text => "#{title_for_cluster}: #{_('None')}")
+
         - if role_allows?(:feature => "storage_show_list")
           = li_link(:count => @record.number_of(:storages),
             :record_id     => @record.id,