700 fix the list of online processing services per project

[vanessavmac]

Summary

Fix bugs associated with filtering processing services by project.

List of Changes

• Fixed the value of "Processing Services Online" on the pipeline overview page. Previous, the count included all processing services of a pipeline across all projects. Filter to only include the activate project.
• Ensure images can only be processed by processing services in the active project.

Related Issues

Closes #700

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[vanessavmac]

@mihow From #700:

Also "Pipelines registered" includes all pipelines under that processing service, not filtered by current project.

285f8ae addresses this bug, but just to make sure I understood correctly: When a user adds pipelines by clicking the "Register Pipelines" button, it automatically adds those pipelines to that project. But if the pipeline is removed from the project (i.e. through Django admin) the user should not be able to see this pipeline as "registered" or in the ProcessingServiceDetails for this project? Not sure how in a real-life use case without the admin this would occur

I also updated the ProcessingServiceDetails so that only pipelines added to the project are visible

[vanessavmac]

@mihow Backend tests failed but I think it's a cache issue? cb69c66 should fix the tests