Make documentation consistent

Documentation was spread between 2 places.
Make it consistent following other plugins' pattern.

Change-Id: Ib58707427c4db3c951f5aafc5ebcb3aa7444b44d
diff --git a/src/resources/Documentation/config.md b/src/main/resources/Documentation/metrics.md
similarity index 100%
rename from src/resources/Documentation/config.md
rename to src/main/resources/Documentation/metrics.md