Unpack content pack with correct option
Unpack content pack with correct option

Using the --foreground option prevents database
access, which is an error if `setup` has not been
run (which is the case at install time).

mrpau/installers,learningequality/installers,benjaoming/installers,benjaoming/installers,learningequality/installers,learningequality/ka-lite-installers,benjaoming/installers,ruimalheiro/installers,learningequality/ka-lite-installers,learningequality/ka-lite-installers,mrpau/installers,ruimalheiro/installers,mrpau/installers,ruimalheiro/installers,learningequality/installers,benjaoming/installers,ruimalheiro/installers,learningequality/ka-lite-installers,learningequality/installers,mrpau/installers