CloudTenant uses GenericButtonMixin for tagging

[ZitaNemeckova]

https://bugzilla.redhat.com/show_bug.cgi?id=1383197

Steps to Reproduce:

1. Navigate to Compute -> Cloud-> Tenants
2. On tenant summary page click on anything for ex:cloud subnets
3. Select a one or more in list view and perform actions (delete/Edit tags)

Before: No route matches {:action=>"tag", :controller=>"cloud_volume", :id=>"10000000000004", :miq_grid_checks=>"10r30"} [cloud_tenant/button]
After: It works.

@miq-bot add_label bug, euwe/yes, fine/yes

[miq-bot]

Checked commit ZitaNemeckova@4e2c0c6 with ruby 2.2.6, rubocop 0.47.1, and haml-lint 0.20.0
1 file checked, 0 offenses detected
Everything looks fine. 🏆

[simaishi]

Euwe backport (to manageiq repo) details:

$ git log -1
commit ce96b834fbdf69978d1a764823d9417311ee7637
Author: Milan Zázrivec <[email protected]>
Date:   Thu Aug 24 16:31:08 2017 +0200

    Merge pull request #1964 from ZitaNemeckova/tag_from_tenant
    
    CloudTenant uses GenericButtonMixin for tagging
    (cherry picked from commit 1b4e834fa451da132f53c3c9e8b3c0f294a6764e)
    
    https://bugzilla.redhat.com/show_bug.cgi?id=1487307

[simaishi]

Fine backport details:

$ git log -1
commit 6675fff356eefd6cf5026868db730fa4dade5581
Author: Milan Zázrivec <[email protected]>
Date:   Thu Aug 24 16:31:08 2017 +0200

    Merge pull request #1964 from ZitaNemeckova/tag_from_tenant
    
    CloudTenant uses GenericButtonMixin for tagging
    (cherry picked from commit 1b4e834fa451da132f53c3c9e8b3c0f294a6764e)
    
    https://bugzilla.redhat.com/show_bug.cgi?id=1487306