[BUG] ExceptionObject has no attribute error_message

[agardnerIT]

python-sdk/open_feature/open_feature_client.py

Line 228 in f3dcad2

error_code=e.error_message,

e.error_message is hardcoded but error_message isn't always available.

  File "/usr/local/lib/python3.9/site-packages/open_feature/open_feature_client.py", line 78, in get_string_value
    return self.evaluate_flag_details(
  File "/usr/local/lib/python3.9/site-packages/open_feature/open_feature_client.py", line 228, in evaluate_flag_details
    error_code=e.error_message,
AttributeError: 'ConnectTimeout' object has no attribute 'error_message'

To Recreate

Add a provider with this signature

def get_string_details(
        self,
        key: str,
        default_value: str,
        evaluation_context: EvaluationContext = None,
        flag_evaluation_options: typing.Any = None,
    ):
      raise("foobar exception")