erb and pp lint requires slaves scripts

The erb and pp linting templates are using git-changed-in-head which is
a slave script.  Mark the jobs with label hasSlaveScripts.

Updated jobs:

operations-puppet-cdh4-erblint-HEAD
operations-puppet-cdh4-pplint-HEAD
operations-puppet-erblint-HEAD
operations-puppet-kafka-erblint-HEAD
operations-puppet-kafka-pplint-HEAD
operations-puppet-zookeeper-erblint-HEAD
operations-puppet-zookeeper-pplint-HEAD

Change-Id: I0cb6e179f56699c8536a97b3177275c83096e085