MULE-6918: Add dynamic round robin routing support
MULE-6918: Fixing imports format
MULE-6918: Add check to validate that message processor's list is not null
MULE-6918: Adjust code after pull request suggestions. Make it work in cluster and add more tests is still pending.
MULE-6918: Apply Mule code style format
Merge pull request #16 from evangelina/mule-3.x

MULE-6918: Add dynamic round robin routing support