listostypes: Fixes #2529 return boolean than string in response

[yadvr]

This returns the boolean value of the isuserdefined key than
converting it to string. Fixes #2529.

Types of changes

• Breaking change (fix or feature that would cause existing functionality to change)
• New feature (non-breaking change which adds functionality)
• Bug fix (non-breaking change which fixes an issue)
• Enhancement (improves an existing feature and functionality)
• Cleanup (Code refactoring and cleanup, that may add test cases)

GitHub Issue/PRs

Screenshots (if appropriate):

How Has This Been Tested?

Checklist:

• I have read the CONTRIBUTING document.
• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
  Testing
• I have added tests to cover my changes.
• All relevant new and existing integration tests have passed.
• A full integration testsuite with all test that can run on my environment has passed.

[yadvr]

I checked no smoke/component test consumes this API key, travis and packaging tests are enough to validate this change.
@blueorangutan package

[blueorangutan]

@rhtyd a Jenkins job has been kicked to build packages. I'll keep you posted as I make progress.

[blueorangutan]

Packaging result: ✔centos6 ✔centos7 ✔debian. JID-2037

[resmo]

LGTM

[nvazquez]

LGTM

[yadvr]

Merging this based on Travis smoke tests and reviews.