Add dependencies to usage example.
Add dependencies to usage example.

Graylog2/graylog2-puppet,Graylog2/graylog2-puppet,Jimdo/graylog2-puppet,Graylog2/graylog2-puppet,Jimdo/graylog2-puppet,treydock/graylog2-puppet,treydock/graylog2-puppet,Jimdo/graylog2-puppet,treydock/graylog2-puppet