Refactor to more common options for jvm

templates/jvm.options.j2

@@ -106,6 +106,8 @@
 # WARNING: This option will be removed in Elasticsearch 6.0.0 and is provided
 # only for migration purposes.
 #-Delasticsearch.json.allow_unquoted_field_names=true
-{% if jmx_remote_monitoring_enabled == true %}
--Dcom.sun.management.jmxremote
+{% if es_jvm_custom_parameters !='' %}
+{% for item in es_jvm_custom_parameters %}
+{{ item }}
+{% endfor %}
 {% endif %}