Author: Petr Skoda
MDL-45219 add report_viewed event to tool_capability
http://git.moodle.org/gw?p=moodle.git;a=commit;h=db473c0d5ae3de285d30890151e77206a2e57b1f
http://github.com/moodle/moodle/commit/db473c0d5ae3de285d30890151e77206a2e57b1f
+ 2.7 en [eventreportviewed,tool_capability]