Adding cloud_tenant nav bar and feature fixtures

* update page header navbar to include cloud tenant link under "Clouds" header
* add miq_product_feature fixtures for tenant feature and children
* add miq_shortcut fixtures for tenant list
Add cloud tenant routes
Show cloud tenants in ems_cloud textual relationships
Add cloud_tenants to EMS Relationships tree view
Add cloud tenant list view inside ems_cloud
Add cloud tenant list page

* create cloud_tenant_controller with show_list method
* copied availability_zone icon for cloud_tenant icon
  - cloud_tenant needs dedicated icon
* created show_list view for cloud_tenant

NOTE: requires cloud_tenant.png icon ... currently borrowing
availability_zone.png icon
Let cloud_tenant be taggable
Add cloud tenant detail page

* add CloudTenantController#show
* add show and _main views for cloud tenant
* add listnav layouts
* add panel_control route for cloud_tenant
* add summary view helpers
Fix cloud tenants nav bar

Show the active nav and subnav selections when viewing cloud tenants
Add security groups and images to tenant view

* add security groups to listnav, textual summary, and graphical summary
* add miq_templates relationship to cloud_tenant model
* add images (miq_templates) to listnav, textual summary, and graphical summary
Whitespace cleanup in cloud_tenant_controller
Add quotas to cloud tenant view

* show all qoutas in textual summary view for cloud tenant