Fix Reset button on Edit Button Group page

[hstastna]

fixing https://bugzilla.redhat.com/show_bug.cgi?id=1486649

Fix Reset button when editing a Button Group in Automation -> Automate -> Customization -> Buttons tab.

The problem was wrong nodetype in group_button_reset method. We want to reset Button Group, not a button nor anything else.

Before:

, [2017-11-07T19:17:07.574795 #25832]  INFO -- : Started POST "/miq_ae_customization/group_update/1000000000041?button=reset" for ::1 at 2017-11-07 19:17:07 +0100
I, [2017-11-07T19:17:07.595585 #25832]  INFO -- : Processing by MiqAeCustomizationController#group_update as JS
I, [2017-11-07T19:17:07.595689 #25832]  INFO -- :   Parameters: {"button"=>"reset", "id"=>"1000000000041"}
I, [2017-11-07T19:17:07.631769 #25832]  INFO -- :   Rendered /home/hstastna/manageiq/manageiq-ui-classic/app/views/layouts/_flash_msg.html.haml (0.0ms)
I, [2017-11-07T19:17:07.657902 #25832]  INFO -- :   Rendered /home/hstastna/manageiq/manageiq-ui-classic/app/views/shared/_playbook_options.html.haml (8.3ms)
I, [2017-11-07T19:17:07.658024 #25832]  INFO -- :   Rendered /home/hstastna/manageiq/manageiq-ui-classic/app/views/shared/buttons/_ab_options_form.html.haml (23.2ms)
I, [2017-11-07T19:17:07.658095 #25832]  INFO -- :   Rendered /home/hstastna/manageiq/manageiq-ui-classic/app/views/shared/buttons/_ab_form.html.haml (32.8ms)
F, [2017-11-07T19:17:07.658257 #25832] FATAL -- : Error caught: [ActionView::Template::Error] no implicit conversion of nil into Array
/home/hstastna/manageiq/manageiq-ui-classic/app/views/shared/_playbook_options.html.haml:8:in `+'
/home/hstastna/manageiq/manageiq-ui-classic/app/views/shared/_playbook_options.html.haml:8:in `__home_hstastna_manageiq_manageiq_ui_classic_app_views_shared__playbook_options_html_haml___3899560385906568952_70135775787060'

After:

[hstastna]

@miq-bot add_label bug

[miq-bot]

Checked commit hstastna@1a07f8d with ruby 2.3.3, rubocop 0.47.1, and haml-lint 0.20.0
1 file checked, 0 offenses detected
Everything looks fine. 🍪

[simaishi]

Gaprindashvili backport details:

$ git log -1
commit 4cd25e8303af62055eb86458ce4abfde69795698
Author: Milan Zázrivec <[email protected]>
Date:   Thu Nov 9 11:04:25 2017 +0100

    Merge pull request #2659 from hstastna/Edit_button_group_reset
    
    Fix Reset button on Edit Button Group page
    (cherry picked from commit 08dabe7b7f5c902f1ee8922fee0819437dffd07e)
    
    https://bugzilla.redhat.com/show_bug.cgi?id=1511518