Policy Event must have at least one action assigned to it

[h-kataria]

Made changes to not allow deleting all actions from a Policy Event, at least one action should be there.

https://bugzilla.redhat.com/show_bug.cgi?id=1395965

before:

after:

@dclarizio please review

[h-kataria]

@Ladas can you take a look failing tests on this PR, those are unrelated to changes in this PR, seems to be failing in NetworkRouterController

[Ladas]

@gildub @tzumainn can you check out the CI failure? Seems like some specs you added recently?

[Ladas]

@h-kataria seems like it's fixed in #115, so you just need to rebase

[gildub]

@h-kataria, @Ladas, yes I confirm, sorry about the split issue!

[miq-bot]

Checked commit h-kataria@92d6591 with ruby 2.2.5, rubocop 0.37.2, and haml-lint 0.16.1
2 files checked, 1 offense detected

spec/controllers/miq_policy_controller/events_spec.rb

• ❕ - Line 57, Col 121 - Metrics/LineLength - Line is too long. [130/120]

[simaishi]

Euwe backport (to manageiq repo) details:

$ git log -1
commit 6f16b752b25c7eb15ff43230327f127f646a7c19
Author: Dan Clarizio <dclarizi@redhat.com>
Date:   Tue Jan 10 10:07:10 2017 -0800

    Merge pull request #112 from h-kataria/policy_event_action_fix
    
    Policy Event must have at least one action assigned to it
    (cherry picked from commit 3d34785eff8ce66ef2ca7304fcffd8794d7dc6cf)
    
    https://bugzilla.redhat.com/show_bug.cgi?id=1413119