Clarify that session.close() is like reset
Clarify that session.close() is like reset

Fixes: #5517
Change-Id: I86809cf84de3ec19a279ae13f4e5e71336d8b359

j5int/sqlalchemy,j5int/sqlalchemy,monetate/sqlalchemy,monetate/sqlalchemy,zzzeek/sqlalchemy,sqlalchemy/sqlalchemy