LRDOCS-1393 removed obsolete last.modified property from 6.1 userguide discover directory.
LRDOCS-1393 Re-added property to discover article. Adding it to errata.
Merge branch 'open-in-ms-office-6.1.x' of https://github.com/jhinkey/liferay-docs into LRDOCS-1393-fix
LRDOCS-1393 Added errata entry for 6.1 userguide removal of last.modified.check property.
Merge pull request #1085 from mwilliams2014/LRDOCS-1393-fix

Lrdocs 1393 fix