Fix for DOCS-95: Do not set publication date on in-progress documentation

git-svn-id: https://svn.forgerock.org/openam/trunk/openam@5946 0f4defcf-c51a-4c67-9f44-6fb5eba73c5d
Back out fix for DOCS-95

The fix is messier than I thought for FO (PDF, RTF), requiring a change to the FO customization in the doc build plugin.

git-svn-id: https://svn.forgerock.org/openam/trunk/openam@5947 0f4defcf-c51a-4c67-9f44-6fb5eba73c5d