Disable Metric Writer by Default

This change disables the metric writer by default.

[resolves #748]

Signed-off-by: Ben Hale <[email protected]>

Author: nebhale

config/metric_writer.yml

@@ -17,4 +17,4 @@
 ---
 version: 3.+
 repository_root: "{default.repository.root}/metric-writer"
-enabled: true
+enabled: false