Use array union operator to get rid of the duplicates.

https://bugzilla.redhat.com/show_bug.cgi?id=1160848
Add test cases for the duplicate columns.

https://bugzilla.redhat.com/show_bug.cgi?id=1160848
region_number/region_description are only intended to be declared on the class immediately under AR::Base.

https://bugzilla.redhat.com/show_bug.cgi?id=1160848
Fixed error on workers tab.

Fixed undefined method `[]' for #<VMDB::Config:0x00000006f06a80> when editing any field on workers tab. We cannot set auth from new[:authentication], @edit[:new] is a config object on the Workers tab. This broke with changes for https://github.com/ManageIQ/manageiq/pull/954
Merge pull request #1114 from lfu/double_columns_1160848

Use array union operator to remove the duplicates.
Merge pull request #1188 from h-kataria/workers_tab_edit_fix

Fixed error on workers tab.
Remove RHEL 6.4 specific Gemfile.lock since it doesn't belong here

[skip ci]
https://bugzilla.redhat.com/show_bug.cgi?id=1171780
Merge pull request #1191 from brandondunne/remove_gemfile_lock

Remove RHEL 6.4 specific Gemfile.lock since it doesn't belong here
Saved reports view: fix missing icon error

PR #841 removed view_textual.png from sources, although this
icon was still being referenced from saved reports view, causing
the following error:

Started GET "/images/toolbars/view_textual.png"
No route matches [GET] "/images/toolbars/view_textual.png"
...

view_list.png is identical to view_textual.png, so let's
use that icon instead.
Merge pull request #1193 from mzazrivec/fix_missing_icon_error

Saved reports view: fix missing icon error