loggregator-agent emits many logs per second when doppler does not exist

[pianohacker]

When there is no upstream doppler (such as when the firehose is disabled) loggregator-agent emits 5 logs a second.

[cf-gitbot]

We have created an issue in Pivotal Tracker to manage this. Unfortunately, the Pivotal Tracker project is private so you may be unable to view the contents of the story.

The labels on this github issue will be updated when the story is started.