Add Sylvain Juge as component owner for jmx-metrics (#1493)

Author: trask

.github/component_owners.yml

@@ -41,6 +41,7 @@ components:
     - sfriberg
   jmx-metrics:
     - breedx-splk
+    - sylvainjuge
   jmx-scraper:
     - breedx-splk
     - robsunday

jmx-metrics/README.md

@@ -278,6 +278,7 @@ file contents can also be provided via stdin on startup when using `-config -` a
 ## Component owners
 
 - [Jason Plumb](https://github.com/breedx-splk), Splunk
+- [Sylvain Juge](https://github.com/sylvainjuge), Elastic
 
 ## Emeritus owners