PAN-195: Add polarization information to DPInfo
Summary
- Add polarization information in DPInfo
- Modify MSReader to read the POLARIZATION subtable and populate DPInfo
- The existing test cases for MSReader should cover this functionality a. The tar'ed MS used in the test case
resources/tNDPPP.in_MS.tgz
was modified to include a POLARIZATION subtable
This was earlier raised as https://gitlab.com/ska-telescope/external/sdp-dp3-visibility-preprocessing/-/merge_requests/1