(GH-451) Fix Boxstarter Package Parameter '-StopOnPackageFailure'

[mwallner]

Description

In the code that evaluates Boxstarter Package Parameters, 'StopOnPackagaFailure' is only recognized (and therefore stripped from the 'chocolatey parameter string) if, and only if 'RebootCodes' were present in the original parameter string.

Related Issue

Fixes #451

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.

[pauby]

Can you update your commit messages to reference the issue number - ie. (GH-451) <COMMIT MESSAGE>?

[pauby]

@mwallner Awesome work! Thanks for your contribution!