fix test title & timeout error

[Joe-Dunleavy]

This PR addresses this issue: https://github.com/finos/FDC3-conformance-framework/issues/169

Changes:

• UCFilteredUsageJoin test was already there, it just had the wrong title which I've now amended
• UCFilteredUsageNoJoin is a duplicate of BasicCH2 so we need to remove UCFilteredUsageNoJoin from the test definitions
• Bug fix: UCFilteredUsageJoin was timing out when run as a single test due to the after each waiting for the mock app window to close. This particular test does not open a mock app and this was causing the test to timeout.

[robmoffat]

.. and this one too - I'll let you press the button and merge this @Joe-Dunleavy

[Joe-Dunleavy]

@robmoffat

both merged