Don't call applyVolumesFrom on containers with volumes already configured (closes #2973)

Docker-DCO-1.1-Signed-off-by: Nolan Darilek <nolan@thewordnerd.info> (github: ndarilek)
Merge pull request #4264 from ndarilek/2973-skip-volumes-from

Don't call applyVolumesFrom on containers with volumes already configure...