test: reduce run time for test-benchmark-http

Specify more configuration options to reduce run time by about a third.

PR-URL: #14180
Fixes: #14177
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
Reviewed-By: Gibson Fahnestock <gibfahn@gmail.com>
Reviewed-By: Evan Lucas <evanlucas@me.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Refael Ackermann <refack@gmail.com>
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>

test/sequential/test-benchmark-http.js

@@ -23,11 +23,14 @@ const env = Object.assign({}, process.env,
 
 const child = fork(runjs, ['--set', 'benchmarker=test-double',
  '--set', 'c=1',
+ '--set', 'chunkedEnc=true',
  '--set', 'chunks=0',
  '--set', 'dur=0.1',
  '--set', 'key=""',
  '--set', 'len=1',
+ '--set', 'method=write',
  '--set', 'n=1',
+ '--set', 'res=normal',
  'http'],
  {env});
 child.on('exit', (code, signal) => {