emit error messages from datadog
emit error messages from datadog

[#114919839](https://www.pivotaltracker.com/story/show/114919839)

Signed-off-by: James Young <9a444a4c06c3f9735f2e8ac5c0dcccd82c90ce93@pivotal.io>

pivotal-cf-experimental/datadog-config-oss,pivotal-cf-experimental/datadog-config-oss