Support FBH5 version 2.0 reporting

[Richard Elkins]

Filterbank H5 formats are in 2 flavors as of rawspec 3.0:

• 1.0
• 2.0 : header nfpc added, additional file-level attributes

[Richard Elkins]

For a valid FBH5 version 1.0 file, h5diag reports like this:

h5diag: Begin
h5diag: VERSION attribute: 1.0
h5diag: header: {'DIMENSION_LABELS': array([b'frequency', b'feed_id', b'time'], dtype=object), 'az_start': 0.0, 'data_type': 1, 'fch1': 8421.386717353016, 'foff': -2.7939677238464355e-06, 'ibeam': 1, 'machine_id': 20, 'nbeams': 1, 'nbits': 32, 'nchans': 1048576, 'nifs': 1, 'rawdatafile': 'guppi_57650_67573_Voyager1_0002.0000.raw', 'source_name': 'Voyager1', 'src_dej': <Angle 12.183 deg>, 'src_raj': <Angle 17.16777333 hourangle>, 'telescope_id': 6, 'tsamp': 18.253611008, 'tstart': 57650.78209490741, 'za_start': 0.0}
h5diag: data shape: (16, 1, 1048576)
h5diag: No errors detected

For a valid FBH5 version 2.0 file (created by rawspec 3.0 or later, producing an .h5 file directly), h5diag reports like this:

h5diag: Begin
h5diag: VERSION attribute: 2.0
h5diag: header: {'DIMENSION_LABELS': array([b'time', b'feed_id', b'frequency'], dtype=object), 'az_start': 0.0, 'data_type': 1, 'fch1': 7438.96484375, 'foff': -2.7939677238464355e-06, 'ibeam': -1, 'machine_id': 20, 'nbeams': 1, 'nbits': 32, 'nchans': 67108864, 'nfpc': 1048576, 'nifs': 1, 'rawdatafile': 'blc13_guppi_57991_49836_DIAG_FRB121102_0010.0000.raw', 'source_name': 'DIAG_FRB121102', 'src_dej': <Angle 33.1479 deg>, 'src_raj': <Angle 5.53295333 hourangle>, 'telescope_id': 6, 'tsamp': 18.253611007999982, 'tstart': 57991.57680555555, 'za_start': 0.0}
h5diag: data shape: (3, 1, 67108864)
Rawspec version: 2.5.0+91@gd699853
Librawspec version: 2.5.0+91@gd699853
cuFFT version: 10.2.1.245
HDF5 version: 1.8.16
Bitshuffle: ENABLED
h5diag: No errors detected