Fix VmCloud Resize/Reconfigure form bugs

[mansam]

This fixes a bug where the buttons on the Resize form don't work if you access the form from outside of an explorer view.
https://bugzilla.redhat.com/show_bug.cgi?id=1445011

This also fixes a bug where retrieving data to populate the form throws an exception because the VM to be resized does not have a flavor.
https://bugzilla.redhat.com/show_bug.cgi?id=1445018

[mansam]

@tzumainn @petrblaho

[tzumainn]

@miq-bot add_lable blocker,bug,fine/yes

[tzumainn]

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

[miq-bot]

@tzumainn unrecognized command 'add_lable', ignoring...

Accepted commands are: add_label, assign, close_issue, move_issue, remove_label, rm_label, set_milestone

[miq-bot]

Checked commits mansam/manageiq-ui-classic@394aeb8~...00d4ba9 with ruby 2.2.6, rubocop 0.47.1, and haml-lint 0.20.0
1 file checked, 0 offenses detected
Everything looks fine. 🍰

[petrblaho]

I think that only solution to https://bugzilla.redhat.com/show_bug.cgi?id=1445018 should be applied to Fine as https://bugzilla.redhat.com/show_bug.cgi?id=1445011 is not reproducible on Fine b/c it works on code introduced by #919 and this is not backported to Fine branch.

So I suggest backporting only 394aeb8 and 00d4ba9 to Fine branch.

What do you thing? @mansam @tzumainn @mzazrivec @simaishi

[tzumainn]

@petrblaho makes sense to me - my fault for forgetting you were testing on master

[tzumainn]

@mansam Can you create a Fine backport for this that only includes the fix for https://bugzilla.redhat.com/show_bug.cgi?id=1445018 ?

[simaishi]

I was about to backport this, perfect timing 😄 Will wait for a Fine PR.

[simaishi]

Backported to Fine via #1186