openHAB - PR368 update 1 of 3 - master branch

1. Fixes egregious formatting error in EXTRA_JAVA_OPTS. My bad!
2. Sets default Java timezone to Etc/UTC.
3. Comments-out logging options (originally added for compatibility with experimental branch).

Test!

```
$ tail -20 docker-compose.yml
  openhab:
    container_name: openhab
    image: "openhab/openhab:latest"
    restart: unless-stopped
    network_mode: host
    volumes:
      - "/etc/localtime:/etc/localtime:ro"
      - "/etc/timezone:/etc/timezone:ro"
      - "./volumes/openhab/addons:/openhab/addons"
      - "./volumes/openhab/conf:/openhab/conf"
      - "./volumes/openhab/userdata:/openhab/userdata"
    environment:
      - OPENHAB_HTTP_PORT=4050
      - OPENHAB_HTTPS_PORT=4051
      - EXTRA_JAVA_OPTS=-Duser.timezone=Etc/UTC

$ DPS openhab
NAMES     CREATED         STATUS
openhab   5 minutes ago   Up 5 minutes (healthy)

$ docker exec openhab bash -c 'echo "EXTRA_JAVA_OPTS=$EXTRA_JAVA_OPTS"'
EXTRA_JAVA_OPTS=-Duser.timezone=Etc/UTC
```

Author: Paraphraser

.templates/openhab/service.yml

@@ -12,8 +12,8 @@ openhab:
   environment:
     - OPENHAB_HTTP_PORT=4050
     - OPENHAB_HTTPS_PORT=4051
-    - EXTRA_JAVA_OPTS: "-Duser.timezone=Europe/Berlin"
-  logging:
-    options:
-      max-size: "5m"
-      max-file: "3"
+    - EXTRA_JAVA_OPTS=-Duser.timezone=Etc/UTC
+# logging:
+#   options:
+#     max-size: "5m"
+#     max-file: "3"