Enable unit completion tracking by default

See discussion:
https://discuss.overhang.io/t/course-not-starting/962/12

CHANGELOG.md

@@ -4,6 +4,7 @@ Note: Breaking changes between versions are indicated by "💥".
 
 ## Unreleased
 
+- 💥[Improvement] Enable unit completion tracking by default.
 - [Bugfix] Run `apt update` before `apt install` when installing deps in the openedx Dockerfile
 
 ## v10.3.1 (2020-10-16)

tutor/templates/hooks/lms/init

@@ -24,4 +24,8 @@ if [ -d /openedx/data/uploads/ ]; then
     mv /openedx/data/uploads/* /openedx/media/
     rm -rf /openedx/data/uploads/
   fi
-fi
+fi
+
+# Create waffle switches to enable some features, if they have not been explicitely defined before
+# Completion tracking: add green ticks to every completed unit
+(./manage.py lms waffle_switch --list | grep completion.enable_completion_tracking) || ./manage.py lms waffle_switch --create completion.enable_completion_tracking on