AST-1292 Adapt tPhaseShift test process methods to unique_ptr interface
Adapt PhaseShift
unit tests in tPhaseShift
to use new DPBuffer
interface and XTensor:
- Update all
process()
interfaces and calls to useunique_ptr
- Replace all Casacore classes/variables/functions with XTensor equivalents. With the exception of antenna positions/phases, these can't yet be updated until the antenna classes and DPInfo provide a new interface.