[ISSUE #6591] Fix Starting nameserver and broker failed because the default java command in Darwin contained Spaces (#6592)

distribution/bin/runbroker.sh

@@ -120,5 +120,5 @@ then
 		numactl --cpunodebind=$RMQ_NUMA_NODE --membind=$RMQ_NUMA_NODE $JAVA ${JAVA_OPT} $@
 	fi
 else
-	$JAVA ${JAVA_OPT} $@
+	"$JAVA" ${JAVA_OPT} $@
 fi

distribution/bin/runserver.sh

@@ -105,4 +105,4 @@ JAVA_OPT="${JAVA_OPT} -XX:-UseLargePages"
 JAVA_OPT="${JAVA_OPT} ${JAVA_OPT_EXT}"
 JAVA_OPT="${JAVA_OPT} -cp ${CLASSPATH}"
 
-$JAVA ${JAVA_OPT} $@
+"$JAVA" ${JAVA_OPT} $@

distribution/bin/tools.sh

@@ -57,4 +57,4 @@ export CLASSPATH=.:${BASE_DIR}/conf:${BASE_DIR}/lib/*:${CLASSPATH}
 JAVA_OPT="${JAVA_OPT} -server -Xms1g -Xmx1g -Xmn256m -XX:MetaspaceSize=128m -XX:MaxMetaspaceSize=128m"
 JAVA_OPT="${JAVA_OPT} -cp ${CLASSPATH}"
 
-$JAVA ${JAVA_OPT} "$@"
+"$JAVA" ${JAVA_OPT} "$@"