[MM-50485] Implement ServerManager, introduce id concept for identifying servers/views (#2654)

* Implement ServerManager, introduce id concept for identifying servers/views

* REVERT ME (eventually): Move back to old logging

* PR feedback

* PR feedback

* Revert "REVERT ME (eventually): Move back to old logging"

This reverts commit 46954a5bbed4dd29e89ca9d5217bb75af2837bb3.

* Merge'd

* Use the correct method for Logger in ServerManager

src/jest/jestSetup.js

@@ -29,6 +29,7 @@ jest.mock('common/log', () => {
             }),
         })),
         setLoggingLevel: jest.fn(),
+        getLevel: jest.fn(),
     };
 });