connectivity data feature bug: some col_names != row_names

[xgui3783]

as of 0.3a16

to reproduce:

from siibra.features.connectivity import (
    PrereleasedStreamlineCountQuery,
)
features = PrereleasedStreamlineCountQuery().features
matrices = [feat.matrix for feat in features]

expected, matrices loads without issues

actual: several cannot be loaded due to

assertion error: expected col_names == row_names

Here is a printout of all datasets that trigger this issue:

XFAIL test/features/test_connectivity.py::test_conn_to_model[conn_feat3]
  reason: Averaged_SC_JuBrain_184Regions_HCP_10M_count_MEAN assertion error: expected col_names == row_names
XFAIL test/features/test_connectivity.py::test_conn_to_model[conn_feat4]
  reason: Averaged_SC_JuBrain_184Regions_eNKI_10M_count_MEAN assertion error: expected col_names == row_names
XFAIL test/features/test_connectivity.py::test_conn_to_model[conn_feat7]
  reason: Averaged_SC_JuBrain_184Regions_HCP_10M_length_MEAN assertion error: expected col_names == row_names
XFAIL test/features/test_connectivity.py::test_conn_to_model[conn_feat8]
  reason: Averaged_SC_JuBrain_184Regions_eNKI_10M_length_MEAN assertion error: expected col_names == row_names
XFAIL test/features/test_connectivity.py::test_conn_to_model[conn_feat11]
  reason: Averaged_FC_JuBrain_184Regions_HCP_REST_FIX_AVER_MEAN assertion error: expected col_names == row_names
XFAIL test/features/test_connectivity.py::test_conn_to_model[conn_feat12]
  reason: Averaged_FC_JuBrain_184Regions_HCP_REST_FIX_CONCAT_MEAN assertion error: expected col_names == row_names
XFAIL test/features/test_connectivity.py::test_conn_to_model[conn_feat13]
  reason: Averaged_FC_JuBrain_184Regions_eNKI_REST_FIX_MEAN assertion error: expected col_names == row_names