Merge branch 'hotfix/4868'

Close #4868
Revise docblocks in Zend\Session\ContainerAbstractServiceFactory
Merge pull request #4981 from pwarnock/hotfix/strip-off-session-container

Revise docblocks in Zend\Session\ContainerAbstractServiceFactory
Merge branch 'hotfix/4981' into develop

Forward port #4981