1. Create testdata_lsstSim. This will be based on 12 images from the current Twinkles Run 1 (or pre-Run 1): 2 epochs each of 6 filters.
2. Add an optional test method to obs_lsstSim that runs if testdata_lsstSim has been declared. This is the way these tests are set up for the other obs_* packages.
3. Add testdata_lsstSim dependency to lsst_ci (which already depends on obs_lsstSim).
This will then be run every time a full standard default Jenkins build is processed.