handle volume snapshot status changes

[AlexanderZagaynov]

Fixes https://bugzilla.redhat.com/show_bug.cgi?id=1561937
Сompanion of ManageIQ/manageiq-providers-amazon#439

[gmcculloug]

@lfu Please review

[lfu]

Normally the yaml file is named after the event instance name. Is there any reason that they are different in this PR?
Please follow the steps in Creating a Pull Request for enhancements to ManageIQ Automate Domain.

[AlexanderZagaynov]

@lfu that instruction won't work:

irb(main):001:0> MiqAeDomain.where(:name => 'ManageIQ').first.update_attributes(:system => false)
PostgreSQLAdapter#log_after_checkout, connection_pool: size: 5, connections: 1, in use: 1, waiting_in_queue: 0
  MiqAeDomain Load (0.4ms)  SELECT  "miq_ae_namespaces".* FROM "miq_ae_namespaces" WHERE "miq_ae_namespaces"."parent_id" IS NULL AND ("miq_ae_namespaces"."name" != '$') AND "miq_ae_namespaces"."name" = $1 ORDER BY "miq_ae_namespaces"."id" ASC LIMIT $2  [["name", "ManageIQ"], ["LIMIT", 1]]
  MiqAeDomain Inst Including Associations (32.0ms - 1rows)
   (0.1ms)  BEGIN
   (0.1ms)  ROLLBACK
ActiveModel::UnknownAttributeError: unknown attribute 'system' for MiqAeDomain.

P.S. this one works: MiqAeDomain.find_by_name('ManageIQ').update_attributes(:source => 'user')

[miq-bot]

Checked commit AlexanderZagaynov@95e0972 with ruby 2.3.3, rubocop 0.52.1, haml-lint 0.20.0, and yamllint 1.10.0
0 files checked, 0 offenses detected
Everything looks fine. ⭐

[lfu]

@AlexanderZagaynov The talk post can't be modified. Any update would show up as comments. The last comment mentions the command that works with the latest DB:

MiqAeDomain.find_by_name(‘ManageIQ’).update_attributes(:source => ‘user’)

[AlexanderZagaynov]

@lfu yeah, I did that. Please review.