CCDB-5077: Fix closin CacheConnectionProvider to close on lifecycle events

[mukkachaitanya]

Problem

Fixes #1205. Follows up on #1206 to fix the issue on non life-cycle events While CacheConenctionProvider is trying to get a connection, it is impossible to stop.

Solution

Add a flag to not go on with connection attempt when a close request has been issued.

Does this solution apply anywhere else?

• [ ] yes
• [x] no

If yes, where?

Test Strategy

Testing done:

• [x] Unit tests
• [ ] Integration tests
• [ ] System tests
• [ ] Manual tests

Release Plan

merge to 5.0.x and further