Column Mapping is not created

Describe the bug Column mapping of custom process is not shown in Purview portal

To Reproduce

import json

from pyapacheatlas.auth import ServicePrincipalAuthentication
from pyapacheatlas.core.typedef import EntityTypeDef, AtlasAttributeDef
from pyapacheatlas.core import PurviewClient
from pyapacheatlas.core.util import GuidTracker
from pyapacheatlas.core import AtlasEntity, AtlasProcess

# Authenticate
oauth = ServicePrincipalAuthentication(
    tenant_id="",
    client_id="",
    client_secret=""
)
client = PurviewClient(
    account_name="",
    authentication=oauth
)

# Create custom process type
my_test_process = EntityTypeDef(
    name = "my_test_process",
    superTypes = ["Process"],
    attributes = [
        AtlasAttributeDef("columnMapping")
    ]
)
client.upload_typedefs(entityDefs=[my_test_process], force_update=True)

guid_tracker = GuidTracker()

# Create entities
input1 = AtlasEntity(
    name="test_input1",
    typeName="DataSet",
    qualified_name="custom://test_input1",
    guid=guid_tracker.get_guid()
)

input2 = AtlasEntity(
    name="test_input2",
    typeName="DataSet",
    qualified_name="custom://test_input2",
    guid=guid_tracker.get_guid()
)

output1 = AtlasEntity(
    name="test_output1",
    typeName="DataSet",
    qualified_name="custom://test_output1",
    guid=guid_tracker.get_guid()
)

column_mapping = [
    {
        "DatasetMapping": {"Source": input1.qualifiedName, "Sink": output1.qualifiedName},
        "ColumnMapping": [
            {"Source": "in1_address", "Sink": "out1_address"},
            {"Source": "in1_customer", "Sink": "out1_customer"},
        ],
    }
]

process = AtlasProcess(
    name="my_test_process",
    typeName="my_test_process",
    qualified_name="custom://my_test_process",
    inputs=[input1, input2],
    outputs=[output1],
    guid=guid_tracker.get_guid(),
    attributes = {"columnMapping": json.dumps(column_mapping)}
)
client.upload_entities(batch=[input1, input2, output1, process])

When I go in Purview portal, the left menu does not show the column:

Expected behavior Something similar to this picture would be expected: https://github.com/wjohnson/pyapacheatlas/issues/165#issuecomment-920141829

Desktop (please complete the following information):

OS: Linux Ubuntu
PyApacheAtlas Version (python -m pyapacheatlas --version): 0.16.0

Thank you!

wjohnson / pyapacheatlas

Column Mapping is not created #287