Fix for OPENAM-3936: incorrect example given for failed when authentication fails with /json/authenticate

Using output obtained from OpenAM 12.0.0-SNAPSHOT Build 8825 (2014-April-30 02:36)


git-svn-id: https://svn.forgerock.org/openam/trunk@8864 0f4defcf-c51a-4c67-9f44-6fb5eba73c5d