Git commits in Moodle 3.3.3 by Alexander Bias

commit 591ff7634df08056899942b061dcf5d59a25ee99
Author: Alexander Bias <alexander.bias@uni-ulm.de>
Date:   Mon, 21 Aug 2017 06:37:06 +0800
Tag:    v3.3.3

MDL-59879 navigation: Add node key to competencies navigation node