build: Update version to 2.4.1.DEV

Depend upon bnd 2.4.1.

Signed-off-by: BJ Hargrave <bj@bjhargrave.com>
travis: For next branch, use cloudbees bnd.next build as bnd repo

Signed-off-by: BJ Hargrave <bj@bjhargrave.com>
Merge pull request #961 from bjhargrave/next

Prepare for 2.4.1 build