DYN-6410 install my packages fix

[dnenov]

Purpose

Addressed a bug where packages under MyPackages section of the PM would not initiate an install. The issue is picked up in this jira thread: https://jira.autodesk.com/browse/DYN-6410

Changes

Declarations

Check these if you believe they are true

• The codebase is in a better state after this PR
• Is documented according to the standards
• The level of testing this PR includes is appropriate
• User facing strings, if any, are extracted into *.resx files
• All tests pass using the self-service CI.
• Snapshot of UI changes, if any.
• Changes to the API follow Semantic Versioning and are documented in the API Changes document.
• This PR modifies some build requirements and the readme is updated
• This PR contains no files larger than 50 MB

Release Notes

• fixed a bug where my package would not initiate an install
• attached RequestDownload handler

Reviewers

@avidit
@reddyashish

FYIs

@Amoursol

[QilongTang]

LGTM