Author: Serge Gauthier
MDL-52675 tool_lp: When deleting template delete or unlink derived plans
http://git.moodle.org/gw?p=moodle.git;a=commit;h=8fabc738824a82f2d8c625f37d4eec48366c799e
http://github.com/moodle/moodle/commit/8fabc738824a82f2d8c625f37d4eec48366c799e
+ 3.1 en [deleteplans,tool_lp]
+ 3.1 en [deletetemplatewithplans,tool_lp]
+ 3.1 en [unlinkplanstemplate,tool_lp]