Add Puppet version 4.9.0 to Travis test matrix
Add Puppet version 4.9.0 to Travis test matrix

Signed-off-by: Akshita Jha <21ecdd397585d71ddbb62f3289ec4230a99dde49@gmail.com>

umeshksingla/puppet-opendaylight,umeshksingla/puppet-opendaylight