Bug 1509910

To verify create a script that performs an update and measure how long it takes:

---8<---
require 'logger'
require 'ovirtsdk4'

# Create the connection to the server:
connection = OvirtSDK4::Connection.new(
  url: 'https://engine42.local/ovirt-engine/api',
  username: 'admin@internal',
  password: 'redhat123',
  insecure: true,
  debug: true,
  log: Logger.new('test.log')
)

# Find the data service:
dcs_service = connection.system_service.data_centers_service
dc = dcs_service.list(search: 'name=mydc').first
dc_service = dcs_service.data_center_service(dc.id)

# Measure how long it takes to update the data center:
before = Time.now
dc = dc_service.update(description: 'Updated description')
after = Time.now
elapsed = after - before
puts("#{elapsed}s")

# Close the connection to the server:
connection.close
--->8---

Execute that script, it should print the time it took to do the update, and it should be less than one second.

In addition the generated `test.log` file should *not* contain this line:

  D, [2017-11-28T18:09:57.011331 #11968] DEBUG -- : Expect: 100-continue

Verified that script suggested by Juan finishes in less than one second. Created log does not contain "DEBUG -- : Expect: 100-continue". 
SDK version 4.2.0.beta2, RHVM 4.1.8.1.