Bump jsonschema minimum to 4.0.0

This allows us to drop some logic from tests.

Change-Id: Idc11c1ce6e208774314a5a867789958372f0d591
Signed-off-by: Stephen Finucane <sfinucan@redhat.com>

nova/tests/unit/compute/test_provider_config.py

@@ -13,14 +13,12 @@
 import copy
 import ddt
 import fixtures
-import importlib.metadata
 import microversion_parse
 import os
 from unittest import mock
 
 from oslo_utils.fixture import uuidsentinel
 from oslotest import base
-from packaging import version
 
 from nova.compute import provider_config
 from nova import exception as nova_exc
@@ -119,17 +117,6 @@ class SchemaValidationTestCasesV1(SchemaValidationMixin):
     @ddt.unpack
     @ddt.file_data('provider_config_data/v1/validation_error_test_data.yaml')
     def test_validation_errors(self, config, expected_messages):
-        # TODO(stephenfin): Drop this once we no longer support jsonschema 3.x
-        jsonschema_version = importlib.metadata.version('jsonschema')
-        if version.parse(jsonschema_version) < version.parse('4.0.0'):
-            if expected_messages == [
-                "should not be valid under {}",
-                "validating 'not' in schema['properties']['__source_file']",
-            ]:
-                expected_messages = [
-                    "{} is not allowed for",
-                    "validating 'not' in schema['properties']['__source_file']",  # noqa: E501
-                ]
         self.run_test_validation_errors(config, expected_messages)
 
     @ddt.unpack

requirements.txt

@@ -22,7 +22,7 @@ netaddr>=0.7.18 # BSD
 netifaces>=0.10.4 # MIT
 paramiko>=2.7.1 # LGPLv2.1+
 iso8601>=0.1.11 # MIT
-jsonschema>=3.2.0 # MIT
+jsonschema>=4.0.0 # MIT
 python-cinderclient!=4.0.0,>=3.3.0 # Apache-2.0
 keystoneauth1>=3.16.0 # Apache-2.0
 python-neutronclient>=7.1.0 # Apache-2.0
@@ -66,4 +66,3 @@ python-dateutil>=2.7.0 # BSD
 futurist>=1.8.0 # Apache-2.0
 openstacksdk>=0.35.0 # Apache-2.0
 PyYAML>=5.1 # MIT
-packaging>=21.0  # Apache-2.0