Add tenant and service id tag to each metric
add control plane service/tenant id to each metric
use request object instead of query param
configuration option to inject metric tags from http parameters
re-enable auth
Response to code review, migrate common code to common class, add unit tests to common code, remove prefix tag configuration
Merge pull request #23 from zenoss/feature/tenant_service_id

Feature/tenant service
Merge branch 'develop' into feature/post_internal_metrics