update metron config

- add etcd parameters
- remove loggregator endpoint

[#74964832]

Signed-off-by: Johannes Petzold <jpetzold@pivotallabs.com>
Announce loggregator health to etcd

[#75142276] [Fix #75453084]

Signed-off-by: John Tuley <jtuley@pivotallabs.com>
automatic promotion by GoCD workflow LoggregatorIntegrationTest/80 > IntegrationTests/1 > IntegrationTests

tests passed against https://github.com/cloudfoundry/cf-release/commit/88f52110d6ce11f56f6c17e96e711b2216ff27a4