Add Lock Held Metrics to diego-datadog-templates
Add Lock Held Metrics to diego-datadog-templates

[#146336655]

Signed-off-by: Nima Kaviani <0ebde517669f70c2aec92dc89d4950413b825ec0@us.ibm.com>

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