Unit tests issues

[aroffringa]

The current development branch shows a few issues in its unit tests:

• tApplyCal.cc(334): Entering test case "test_gain" -- shows Invalid read of size 1 in valgrind
• tApplyCalH5.cc(350): Entering test case "testampl1" -- shows multiple Invalid read of size 8
• tApplyCalH5.cc(358): Entering test case "testampl2" -- idem
• tApplyCalH5.cc(366): Entering test case "testampl3" -- idem
• tBaselineSelection.cc(210): Entering test case "test_5" prints twice the following to the console: PreFlagger baseline [rs01.s01,rs02*] means two antennae, but is somewhat ambigious; it's more clear to use [[ant1],[ant2]] (when using the latest casacore)
• tGridInterpolate.cc(32): Entering test case "test_gridinterpolate"
• tPSet.cc(399): Entering test case "test_bl1" -- prints PreFlagger baseline [rs01.*, rs02.s01] means two antennae, but is somewhat ambigious; it's more clear to use [[ant1],[ant2]]
• tPSet.cc(404): Entering test case "test_bl_error3" -- prints PreFlagger: no matches for baseline name pattern [a,b]
• tStationAdder.cc(523): Entering test case "test_superstation_of_nonexisting_stations" -- prints StationAdder: no matching stations found for pattern nonexistingstationpattern