Fix for javascript error when attempting to edit a service dialog based on orchestration template

[eclarizio]

The issue states that there was an infinite spinner when clicking on the dialog to edit in the Automate -> Customization section, which uses the sample page to initially show the dialog. However, the sample page has no reason to call the offending method initializeDialogSelectPicker since that method sets up the field to call to a url and/or trigger refreshes which make no sense on the sample page. Thus, we should simply use miqInitSelectPicker to give us the patternfly styling we want without the unnecessary setup.

Fixes https://bugzilla.redhat.com/show_bug.cgi?id=1638420

@miq-bot assign @h-kataria
@miq-bot add_label bug

[h-kataria]

verified fix.

[simaishi]

Hammer backport details:

$ git log -1
commit 81f32e3b3e7e49c43d0264871645d919be840d05
Author: Harpreet Kataria <hkataria@redhat.com>
Date:   Thu Oct 11 17:55:34 2018 -0400

    Merge pull request #4759 from eclarizio/BZ1638420
    
    Fix for javascript error when attempting to edit a service dialog based on orchestration template
    
    (cherry picked from commit 6f48f1410207d8d9817435d6de4c1bf08fe78f2e)
    
    Fixes https://bugzilla.redhat.com/show_bug.cgi?id=1638420