Author: Andrew Nicols
MDL-61407 quizaccess: Add null_writer implementations
http://git.moodle.org/gw?p=moodle.git;a=commit;h=07049468e6366531e486f749a2bede425c2bb763
http://github.com/moodle/moodle/commit/07049468e6366531e486f749a2bede425c2bb763
+ 3.3 en [privacy:metadata,quizaccess_delaybetweenattempts]
+ 3.3 en [privacy:metadata,quizaccess_ipaddress]
+ 3.3 en [privacy:metadata,quizaccess_numattempts]
+ 3.3 en [privacy:metadata,quizaccess_offlineattempts]
+ 3.3 en [privacy:metadata,quizaccess_openclosedate]
+ 3.3 en [privacy:metadata,quizaccess_password]
+ 3.3 en [privacy:metadata,quizaccess_safebrowser]
+ 3.3 en [privacy:metadata,quizaccess_securewindow]
+ 3.3 en [privacy:metadata,quizaccess_timelimit]