Add task thin executions by name and fix missing docs.

[corneil]

Change TaskTemplate to use task/thinexecutions instead of task/executions.

Add task thin executions by name. Update api-guide.adoc with links to generated documentation. Modify TaskCommands to use thin executions since it provides the data required. Removed duplicate entries from api docs.

Fixes #5991 Fixes #5973

[cppwfs]

Hmm... Looks like the build failed with the following test failure: RootControllerTests.rootControllerResponse:71

[corneil]

When I tested the PR with the following URL http://localhost:9393/tasks/thinexecutions?name=nope I expected no results, but all task executions were returned.

Added test for name=nope resulting in empty page.

[cppwfs]

Thank you for verifying. I pulled down the latest and rebuilt the project and now seeing something a different, investigating.

[cppwfs]

Looks like we picked up a CI test failure.