AME-4298, CR-4390 - Merge changes from trunk and update com.iplanet.dpro.session.Session in accordance with code review comments

Updates to Session: Add comment to run method and update AtomicBoolean logic in removeSID.

git-svn-id: https://svn.forgerock.org/openam/branches/AME-3423@10390 0f4defcf-c51a-4c67-9f44-6fb5eba73c5d
AME-4298, CR-4390 - Merge changes from trunk

git-svn-id: https://svn.forgerock.org/openam/branches/AME-3423@10395 0f4defcf-c51a-4c67-9f44-6fb5eba73c5d
AME-3423: Merging changes from trunk

git-svn-id: https://svn.forgerock.org/openam/branches/AME-3423@10396 0f4defcf-c51a-4c67-9f44-6fb5eba73c5d