PIM-3219 : stabilize composer.json
PIM-3219 : fix jenkins builds
PIM-3219 : fix travis builds
Merge pull request #1615 from akeneo/fix/minimum-stability

PIM-3219 : stabilize composer.json
Merge branch 'master' into merge-1.2-fixes

Conflicts:
	composer.json
Merge pull request #1616 from akeneo/merge-1.2-fixes

Merge 1.2 fixes