Add SpecHelper.disable_spawning helper method

[Fryguy]

This helps simplify the setup for RSpec, particularly when you only want to disable_spawning in particular specs.

@agrare Please review.

[kbrock]

think you need a little more documentation around when you pass in a filepath.

In that case it disables for only a particular path?

Maybe doc a few examples above disable_spawning(config) ?

[miq-bot]

This pull request has been automatically marked as stale because it has not been updated for at least 3 months.

If these changes are still valid, please remove the stale label, make any changes requested by reviewers (if any), and ensure that this issue is being looked at by the assigned/reviewer(s)

Thank you for all your contributions! More information about the ManageIQ triage process can be found in the triage process documentation.

[kbrock]

Yea. A little confused what the file_path does for us.
So adding a quick blurb in the Readme for a configuration example would help.
Also fixing the hashrocket cop would be nice.

[Fryguy]

@kbrock Updated.

[miq-bot]

Checked commit Fryguy@fcdd7cb with ruby 2.6.10, rubocop 1.28.2, haml-lint 0.35.0, and yamllint
2 files checked, 0 offenses detected
Everything looks fine. ⭐