Merge pull request #919 in CASA/casa from hotfix/2019March27_vlaimaging to master
* commit 'f3b58cc90c74b902cbb864d84d89347ea8d151fe':
Updated imaging rms values for the VLA test
Merge pull request #917 in CASA/casa from CAS-12168 to master
* commit 'c840b6e56c7dd93b3ffbe286e0b1f97cd11475e5': CAS-12168: Small tweak to solmode and rmsthresh parameter description in gaincal.xml
In VisCalSolver2::solveL1R(), tweak first guess for parameters when L1 is turned on, so initial residuals on the refant's baselines aren't degenerate in Hessian calculation. This prevents the refant from being spuriously flagged, which was happening a small fraction of the time in tests.
Adjust ~float-precision test value a bit to satisfy EL6/7.
Use cerr to report test values so they appear in the bamboo artifacts.
Fixed xml problem (floatArray not supported!) in gaincal.xml, which causes error on CASA startup (and apparently causes bamboo testing to hang). Improved logging of L1/R info.
Introduce L1 and R solving capabilities (gaincal only).
