Author: Huong Nguyen
MDL-73784 usertours: Make End tour button's label translatable
We can use the Moodle language format for End tour button's label now
http://git.moodle.org/gw?p=moodle.git;a=commit;h=681df032041ca6df83e18196908ca14c0dc88182
http://github.com/moodle/moodle/commit/681df032041ca6df83e18196908ca14c0dc88182
+ 4.0 en [endtourlabel_help,tool_usertours]