PLUGIN_REGISTRY[language]()() KeyError: 'java'

```
➜ aws-ec2-networkinsightspath git:(mainline) cfn test --endpoint https://ec2.us-east-1.amazon.com
=== Unhandled exception ===
Please report this issue to the team.
Issue tracker: github.com/aws-cloudformation/cloudformation-cli/issues
Please include the log file 'rpdk.log'
➜ aws-ec2-networkinsightspath git:(mainline) ls
README.md build.gradle inputs pom.xml rpdk.log src
aws-ec2-networkinsightspath.json canary-bundle lombok.config resource-role.yaml settings.internal.json template.yml
➜ aws-ec2-networkinsightspath git:(mainline) cat rpdk.log
[2021-06-03T17:47:39Z] DEBUG - Logging set up successfully
[2021-06-03T17:47:39Z] DEBUG - Running test: Namespace(version=False, subparser_name='test', command=, verbose=0, endpoint='http://127.0.0.1:3001', function_name='TypeFunction', region='us-east-1', role_arn=None, cloudformation_endpoint_url=None, enforce_timeout='30', log_group_name=None, log_role_arn=None, passed_to_pytest=[], docker_image=None)
[2021-06-03T17:47:39Z] DEBUG - Root directory: /Volumes/workspace/AWSCloudFormationResourceProvidersEC2NI/src/AWSCloudFormationResourceProvidersNetworkInsights/aws-ec2-networkinsightspath
[2021-06-03T17:47:39Z] DEBUG - Loading project file '/Volumes/workspace/AWSCloudFormationResourceProvidersEC2NI/src/AWSCloudFormationResourceProvidersNetworkInsights/aws-ec2-networkinsightspath/.rpdk-config'
[2021-06-03T17:47:39Z] DEBUG - Unhandled exception
Traceback (most recent call last):
File "/usr/local/lib/python3.9/site-packages/rpdk/core/cli.py", line 100, in main
args.command(args)
File "/usr/local/lib/python3.9/site-packages/rpdk/core/test.py", line 181, in test
project.load()
File "/usr/local/lib/python3.9/site-packages/rpdk/core/project.py", line 413, in load
self.load_settings()
File "/usr/local/lib/python3.9/site-packages/rpdk/core/project.py", line 202, in load_settings
self.validate_and_load_resource_settings(raw_settings)
File "/usr/local/lib/python3.9/site-packages/rpdk/core/project.py", line 231, in validate_and_load_resource_settings
self._plugin = load_plugin(raw_settings["language"])
File "/usr/local/lib/python3.9/site-packages/rpdk/core/plugin_registry.py", line 27, in load_plugin
return PLUGIN_REGISTRY[language]()()
KeyError: 'java'
[2021-06-03T17:48:07Z] DEBUG - Logging set up successfully
[2021-06-03T17:48:07Z] DEBUG - Running test: Namespace(version=False, subparser_name='test', command=, verbose=0, endpoint='http://127.0.0.1:3001', function_name='TypeFunction', region='us-east-1', role_arn=None, cloudformation_endpoint_url=None, enforce_timeout='30', log_group_name=None, log_role_arn=None, passed_to_pytest=[], docker_image=None)
[2021-06-03T17:48:07Z] DEBUG - Root directory: /Volumes/workspace/AWSCloudFormationResourceProvidersEC2NI/src/AWSCloudFormationResourceProvidersNetworkInsights/aws-ec2-networkinsightspath
[2021-06-03T17:48:07Z] DEBUG - Loading project file '/Volumes/workspace/AWSCloudFormationResourceProvidersEC2NI/src/AWSCloudFormationResourceProvidersNetworkInsights/aws-ec2-networkinsightspath/.rpdk-config'
[2021-06-03T17:48:07Z] DEBUG - Unhandled exception
Traceback (most recent call last):
File "/usr/local/lib/python3.9/site-packages/rpdk/core/cli.py", line 100, in main
args.command(args)
File "/usr/local/lib/python3.9/site-packages/rpdk/core/test.py", line 181, in test
project.load()
File "/usr/local/lib/python3.9/site-packages/rpdk/core/project.py", line 413, in load
self.load_settings()
File "/usr/local/lib/python3.9/site-packages/rpdk/core/project.py", line 202, in load_settings
self.validate_and_load_resource_settings(raw_settings)
File "/usr/local/lib/python3.9/site-packages/rpdk/core/project.py", line 231, in validate_and_load_resource_settings
self._plugin = load_plugin(raw_settings["language"])
File "/usr/local/lib/python3.9/site-packages/rpdk/core/plugin_registry.py", line 27, in load_plugin
return PLUGIN_REGISTRY[language]()()
KeyError: 'java'
[2021-06-03T17:48:14Z] DEBUG - Logging set up successfully
[2021-06-03T17:48:14Z] DEBUG - Running test: Namespace(version=False, subparser_name='test', command=, verbose=0, endpoint='https://ec2.us-east-1.amazon.com', function_name='TypeFunction', region='us-east-1', role_arn=None, cloudformation_endpoint_url=None, enforce_timeout='30', log_group_name=None, log_role_arn=None, passed_to_pytest=[], docker_image=None)
[2021-06-03T17:48:14Z] DEBUG - Root directory: /Volumes/workspace/AWSCloudFormationResourceProvidersEC2NI/src/AWSCloudFormationResourceProvidersNetworkInsights/aws-ec2-networkinsightspath
[2021-06-03T17:48:14Z] DEBUG - Loading project file '/Volumes/workspace/AWSCloudFormationResourceProvidersEC2NI/src/AWSCloudFormationResourceProvidersNetworkInsights/aws-ec2-networkinsightspath/.rpdk-config'
[2021-06-03T17:48:14Z] DEBUG - Unhandled exception
Traceback (most recent call last):
File "/usr/local/lib/python3.9/site-packages/rpdk/core/cli.py", line 100, in main
args.command(args)
File "/usr/local/lib/python3.9/site-packages/rpdk/core/test.py", line 181, in test
project.load()
File "/usr/local/lib/python3.9/site-packages/rpdk/core/project.py", line 413, in load
self.load_settings()
File "/usr/local/lib/python3.9/site-packages/rpdk/core/project.py", line 202, in load_settings
self.validate_and_load_resource_settings(raw_settings)
File "/usr/local/lib/python3.9/site-packages/rpdk/core/project.py", line 231, in validate_and_load_resource_settings
self._plugin = load_plugin(raw_settings["language"])
File "/usr/local/lib/python3.9/site-packages/rpdk/core/plugin_registry.py", line 27, in load_plugin
return PLUGIN_REGISTRY[language]()()
KeyError: 'java'
```