openHAB - PR370 update 3 of 3 - experimental branch

1. Fixes egregious formatting error in EXTRA_JAVA_OPTS. My bad!
2. Sets default Java timezone to Etc/UTC.
3. Leaves logging options unchanged (ie as I found it).

Author: Paraphraser

.internal/templates/services/openhab/template.yml

@@ -12,7 +12,7 @@ openhab:
   environment:
     - OPENHAB_HTTP_PORT=4050
     - OPENHAB_HTTPS_PORT=4051
-    - EXTRA_JAVA_OPTS: "-Duser.timezone=Europe/Berlin"
+    - EXTRA_JAVA_OPTS=-Duser.timezone=Etc/UTC
   logging:
     options:
       max-size: "5m"