2022-December-31 - 2.6.14247

Fix "host is unreachable" causing extra error message window (#11317)

* Fix - when host is unreachable when hosting a lobby game, dont initialize keepAliveTimer to avoid NPE

* Fix - update to add checkstyle fixes and fix failing unit test

* Fix - address PR comments, create reusable mocks with @Mock and have tests throw generic Exception according to convention

* Fix - another spotlessApply fix