Fix gem issues related to rails 5.0 release

[bdunne]

Rails 5 has a minimum Ruby version of 2.2.2. Several of our gems depend on ActiveSupport. In order to support older Ruby versions in our gems, I've added blank to more_core_extensions and dropped the dependencies on activesupport.

[bdunne]

Includes ManageIQ/ovirt#55

[jhernand]

@bdunne, @chessbyte, note that the change to use the version 0.11.0 of the ovirt gem is needed to fix bug 1352967, so eventually it will need to be backported to the darga branch. Are you planning to also backport the other Rails 5 changes included in this PR?

[miq-bot]

<pr_mergeability_checker />This pull request is not mergeable. Please rebase and repush.

[chessbyte]

@bdunne please rebase and push again

[chessbyte]

@jhernand if you need a gem change to fix bug 1352967, please make PR and label it as darga/yes

[miq-bot]

Checked commits bdunne/manageiq@dbf1872~...4ea7bea with ruby 2.2.5, rubocop 0.37.2, and haml-lint 0.16.1
3 files checked, 1 offense detected

gems/pending/util/miq-system.rb

• ❗ - Line 1, Col 1 - Style/FileName - Use snake_case for source file names.

[bdunne]

@miq-bot rm_label wip

[Fryguy]

@bdunne Is this darga/yes or darga/no?

[chessbyte]

@bdunne @Fryguy darga?

[bdunne]

I would say darga/yes since @jhernand needs the changes in the ovirt gem and I don't think you can bundle without all of the gem changes in this PR.

[chessbyte]

@bdunne running git cherry-pick -x -m 1 f050c9e on darga causes merge conflicts.

Please make PR against Darga

[jhernand]

/cc @durandom

[chessbyte]

Backported to Darga via #9756

[jhernand]

Thanks @chessbyte and @bdunne .