fixing make init loop & allow certs removal

[benibr]

This PR removes the init target from the initcomposefile target as it results in a loop. A subtarget should never call its parent. Instead an error message is displayed.

It also moves the rm -rf ./certs to the clean target. The way I see it, they should be removed if one calls make clean, like https confs and the application folder.

[jonasbardino]

Good catch with the init loop, that must have slipped in during my initcomposefile docker-dependency work.