Author: Paul Holden
MDL-80245 reportbuilder: define custom report tags area.
http://git.moodle.org/gw?p=moodle.git;a=commit;h=a1f064339db0be5404bf2d368853d2cdf51d1ba9
http://github.com/moodle/moodle/commit/a1f064339db0be5404bf2d368853d2cdf51d1ba9
+ 4.4 en [tagarea_reportbuilder_report,core_reportbuilder]