subpath field is not removed when submitting workload from file

[shashwathi]

Pull request
subpath field is not ignored when submitting workload from file(both while creating & updating)

What this PR does / why we need it

Fixes #88

Describe testing done for PR

• create workload with subPath
• export the workload into a file
• apply the workload again, subPath should not be deleted

[atmandhol]

Minor nit, when we merge this, we should change the commit message from [fix] to fix: to follow the standard.

[heyjcollins]

AC

LGTM

confirm original issue fixed

• created workload without subPath
• added subpath via flag
• export the workload into a file
• apply the workload.yaml without any additional flags, subPath was not deleted.

confirm via alternate approach-ish

• created workload via file, including a sub-path
• exported workload yaml
• applied workload yaml, sub-path was not deleted

confirm removal from file not regressed

• removed source.sub-path from workload.yaml (for existing workload)
• applied workload yaml, confirmed sub-path was removed