Use same print in all the printer classes
Use same print in all the printer classes

Use a single print method to print to the output stream instead of
specifying it in every print command.

Change-Id: Iba5ca966a64edd02725d764d12a6e93b571af692
Partial-Bug: #1734146

openstack/dragonflow,openstack/dragonflow,openstack/dragonflow