Reduce the CI parallelism to speedup flow

The current number of available slaves on our CI is
too low to allow a high parallelism of changes validations.

Temporarily lower the threshold to speedup the executions
of the changes validations in queue.

Change-Id: I98450d42dfcbcf99225fc92b19c493457bf530e8
1 file changed
tree: 004d004e3fdf12af99c7c07aae97d4797b693a20
  1. jenkins/
  2. jenkins-docker/
  3. .gitignore