post_entity will not completely override the existing entity

[djs0109]

Describe the bug
post_entity will not completely override the existing entity

To Reproduce

1. create entity

entity = {
    "id": "Test:001",
    "type": "Test",
    "humidity": {
        "type": "Number",
        "value": 1,
        "metadata": {}
    },
    "temperature": {
        "type": "Number",
        "value": 1,
        "metadata": {}
    }
}
cb_client.post_entity(ContextEntity(**entity))

2. delete an attribute and update entity with post_entity

entity_delete_attr = {
    "id": "Test:001",
    "type": "Test",
    "temperature": {
        "type": "Number",
        "value": 1,
        "metadata": {}
    }
}
cb_client.post_entity(ContextEntity(**entity_delete_attr ), update=True)

Expected behavior

The attribute humidity is deleted, which is currently not.

Environment

• Orion 3.7.0

[github-actions]

Branch 232--post_entity-will-not-completely-override-the-existing-entity created!