streaming large content cause out of memory exception.

When ofbiz streams a large content (eg. video file), get out of memory exception.

console output...
2018-01-01 05:01:03,933 |jsse-nio-8443-exec-2 |MycoReqMapHandlerBase |E| Java heap space
java.lang.OutOfMemoryError: Java heap space
at org.apache.commons.io.output.ByteArrayOutputStream.needNewBuffer(ByteArrayOutputStream.java:127) ~[commons-io-2.5.jar:2.5]
at org.apache.commons.io.output.ByteArrayOutputStream.write(ByteArrayOutputStream.java:158) ~[commons-io-2.5.jar:2.5]
at org.apache.commons.io.IOUtils.copyLarge(IOUtils.java:2147) ~[commons-io-2.5.jar:2.5]
at org.apache.commons.io.IOUtils.copy(IOUtils.java:2102) ~[commons-io-2.5.jar:2.5]
at org.apache.commons.io.IOUtils.copyLarge(IOUtils.java:2123) ~[commons-io-2.5.jar:2.5]
at org.apache.commons.io.IOUtils.copy(IOUtils.java:2078) ~[commons-io-2.5.jar:2.5]
at org.apache.commons.io.IOUtils.toByteArray(IOUtils.java:721) ~[commons-io-2.5.jar:2.5]