Remove unused code in oonicli.py
Open report in director, not generateMeasurements
Fix reporter bug where created callback was not fired
All NetTest unit tests pass
Clean up NetTest tests
Update MockReporter

the created deferred should not get called until after createReport
is fired
Update director tests
Remove dependency of NetTest on Director and Reporter
Length of measurements should indeed be 20
Refactor test_case loader so that test methods share an input set