DRIVERS-2530 : Drivers should implement the sessions spec changes in 90cfaef , removing the server selection step for session support and relying exclusively on the `logicalSessionTimeoutMinutes` reported by the checked out connection instead. Two new prose tests are added to ensure the user-facing behavior for explicit and implicit sessions remains unchanged when communicating with a server that does not support sessions. This work is a pre-requisite for sever selection logging ( DRIVERS-1671 ), which will define additional tests to ensure no server selection is performed for session support.