GitHub Issue 1424: Prevent resource exhaustion from AnalyzeQueriesAction

[labkey-jeckels]

Rationale

Cross Folder Dependencies in the schema browser is an easy way to DOS when using HTTP2, which essentially fires requests for every subfolder concurrently. We need to throttle this and can also improve the UX significantly.

Changes

• Limit the client side to 4 concurrent analysis requests
• New ConcurrencyLimit annotation to limit the number of concurrent requests on the server-side
• Cap AnalyzeQueriesAction to 10 concurrent requests
• Filter domains before creating the DomainImpl
• Default to project-scoped analysis
• Show number of folders to be analyzed
• Give a cancel option
• Show all errors during analysis
• Always show the Dependency Report, even when there are no dependencies to show
• Show the scope that was analyzed in the Dependency Report

[labkey-klum]

Overall seems like a good improvement. I did pull down the changes and did some manual testing, error validation.