DD gaintables not dumped in CASA format

[bennahugo]

Ok this is a bug...
Somewhere the initialization for the DD gain machines are not properly passed.

 - 10:34:11 - param_db           [io] [1.6/4.7 44.2/45.8 0.6Gb] dimensions of dd:gain are 3,40,86,17,2,2
 - 10:34:11 - param_db           [io] [1.6/4.7 44.2/45.8 0.6Gb] dimensions of dd:gain.err are 3,40,86,17,2,2
 - 10:34:11 - param_db           [io] [1.6/4.7 44.2/45.8 0.6Gb] saved updated parameter skeletons to /home/hugo/msdir/COMBINED.J1631-7507.1GC.ms/dd-field_0-ddid_None.parmdb.skel
 - 10:34:11 - param_db           [io] [1.6/4.7 44.2/45.8 0.6Gb] wrote /home/hugo/msdir/COMBINED.J1631-7507.1GC.ms/dd-field_0-ddid_None.parmdb in fragmented mode
 - 10:34:11 - param_db           [io] [1.6/4.7 44.2/45.8 0.6Gb] reading /home/hugo/msdir/COMBINED.J1631-7507.1GC.ms/dd-field_0-ddid_None.parmdb in fragmented mode
 - 10:34:11 - param_db           [io] [1.6/4.7 44.2/45.8 0.6Gb]   loading dd:gain, shape 3x40x86x17x2x2
 - 10:34:11 - param_db           [io] [1.6/4.7 44.2/45.8 0.6Gb]   loading dd:gain.err, shape 3x40x86x17x2x2
 - 10:34:12 - casa_db_adaptor    [io] [1.6/4.7 44.2/45.8 0.6Gb] Measurement metadata not set. Cannot write CASA-style gaintable.