Revert "Separate composer from sources"

This reverts commit facf878fcca1f558eb8e20cc8579577d9f2b3286.

Change-Id: I49b78da92360a9eba59b8f325d1631c8a1efb516
Merge commit 'refs/changes/45/2845/1' of ssh://gerrit.tuleap.net:29418/tuleap into stable

* ssh://gerrit.tuleap.net:29418/tuleap:
  Revert "Separate composer from sources"

Change-Id: I5530004de4bfdfb932ce191eb31e01f9cb45ffff
This is Tuleap 7.3.99.25

Change-Id: I66fee0a87994137f505a1c122623a2b7cf72b305