doc/dev/developer_guide/testing_integration_tests: update "frequently used options"
The `subset` option is important in Teuthology runs for reducing the number of tests that are triggered. This option is outlined in another part of the Teuthology documentation, but I think it's important to place here as well.
Also, -n (for how many times the job will run) is incorrect; it should be -N.
projects / ceph.git / commit