role::parsoid::beta needs contint slave scripts

The Jenkins jobs doing the updates on the beta instances need a script
from the integration/jenkins.git repository. That is provided by the
class contint::slave-scripts.

Change-Id: Iba5a2c260d3155b6f2aee359e17d1e4a558e8d79
Merge "role::parsoid::beta needs contint slave scripts" into production