Fix query parameter in /api/libraries/{id}/permissions

[davelopez]

What did you do?

• Rename the query parameter to q in GET /api/libraries/{id}/permissions

Why did you make this change?

The q parameter sent by the UI was being ignored as the API was expecting query when filtering roles during libraries permission management.

How to test the changes?

(select the most appropriate option; if the latter, provide steps for testing below)

• I've included appropriate automated tests.
• This is a refactoring of components with existing test coverage.
• Instructions for manual testing are as follows:
  1. Log in as Admin
  2. Go to Data Libraries
  3. Click on Manage in any folder or dataset
  4. Try to type the name of a role in any of the boxes
  5. The list should be filtering the roles as you type

License

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• I agree to allow the Galaxy committers to license these and all my past contributions to the core galaxy codebase under the MIT license. If this condition is an issue, uncheck and just let us know why with an e-mail to galaxy-committers@lists.galaxyproject.org.