For CAS-14694: In SolvableVisCal::setSimulate, for simulation of DJones only, short-circuit VI major and minor iteration over the MS so that instrumental polarization is neither time- nor (for mosaic sims) field-dependent. This breaks 'testSky_intLeak' in test_task_simobserve.py. NB: this is not yet a complete polarimetry simulation because parang is not yet treated.
Pull request #1049: CAS-14792
Merge in CASA/casa6 from CAS-14792 to master
* commit 'c4206a386e84fa23a749f5b95753860d36396bd7':
added more text to describe the measures data install step
readme.md uses www.astron.nl now for measures data
