CHE-4977; enable UseStringDeduplication java flag for WS agent; (eclipse-che#5074)

Author: Max Shaposhnik

assembly/assembly-wsagent-server/src/assembly/setenv.sh

@@ -13,7 +13,7 @@
 [ -z "${CHE_LOCAL_CONF_DIR}" ]  && CHE_LOCAL_CONF_DIR="${CATALINA_HOME}/conf/"
 
 #Global JAVA options
-[ -z "${JAVA_OPTS}" ]  && JAVA_OPTS="-Xms256m -Xmx1024m  -Djava.security.egd=file:/dev/./urandom"
+[ -z "${JAVA_OPTS}" ]  && JAVA_OPTS="-Xms256m -Xmx1024m -XX:+UseG1GC -XX:+UseStringDeduplication -Djava.security.egd=file:/dev/./urandom"
 
 #Global LOGS DIR
 [ -z "${CHE_LOGS_DIR}" ]  && CHE_LOGS_DIR="$CATALINA_HOME/logs"