Filters stoplight SLI metrics by deployment
Filters stoplight SLI metrics by deployment

This is in preparation for adding similar metrics to staging.

[#146554555]

Signed-off-by: Corey Innis <c6de6a297c7ba72017894924528d266f693d3f31@pivotal.io>

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