HPCC-9570 SOAPCALL returning "Request too large for buffer fragment"

If a SOAPCALL service returns chunked data and any chunk is larger than
64K, an error is reported and the data transfer is aborted.  This fix
allows chunks of any size by removing the size check

Signed-off-by: William Whitehead <william.whitehead@lexisnexis.com>
Merge branch 'soapcall' into candidate-4.0.0

Signed-off-by: Richard Chapman <rchapman@hpccsystems.com>