add GROOVY_TURN_OFF_JAVA_WARNINGS

src/main/assemblies/files/fess.in.bat

@@ -121,3 +121,5 @@ set FESS_JAVA_OPTS=%FESS_JAVA_OPTS% -Dtomcat.config.path=tomcat_config.propertie
 REM External elasticsearch cluster
 REM set FESS_JAVA_OPTS=%FESS_JAVA_OPTS% -Dfess.es.http_address=http://localhost:9200
 REM set FESS_JAVA_OPTS=%FESS_JAVA_OPTS% -Dfess.dictionary.path=%ES_HOME%/config/
+
+set GROOVY_TURN_OFF_JAVA_WARNINGS=true

src/main/assemblies/files/fess.in.sh

@@ -121,3 +121,4 @@ if [ "x$FESS_DICTIONARY_PATH" != "x" ]; then
   FESS_JAVA_OPTS="$FESS_JAVA_OPTS -Dfess.dictionary.path=$FESS_DICTIONARY_PATH"
 fi
 
+GROOVY_TURN_OFF_JAVA_WARNINGS=true