Add tests and fix for error on getting multiple arguments

[Christina-Kang]

Fixes #122

Changes include:

• Add tests to ensure these commands will get coverage for similar errors
• Fix command behavior.
• Note: these failures have not been released, so there is no impact from these errors.
• Add tests for create application path generation

Verifed:

• Build and test CI passes
• History and readme updated to reflect changes
• Package version updated according to semantic versioning rules
• Tests modified or added, when applicable
• Updated code owners file, when applicable
• Read the PR checklist

[coveralls]

Coverage increased (+2.8%) to 85.461% when pulling 74639fc on Christina-Kang:fix-multiple-values-for-argument-knack-4.2-upgrade into f25e471 on Microsoft:master.

[coveralls]

Coverage increased (+2.7%) to 85.867% when pulling ab7ad11 on Christina-Kang:fix-multiple-values-for-argument-knack-4.2-upgrade into 83ca819 on Microsoft:master.