Fix: GT query for SCALE_SOLUTION subtask type

[chrisdicaprio]

For general tasks that are subtask type: SCALE_SOLUTION the following query results in an error:

can be demonstrated using ID R2VuZXJhbFRhc2s6MTA1NTc0 in PROD

qry = '''
            query one_general ($id:ID!)  {
              node(id: $id) {
                __typename
                ... on GeneralTask {
                  id
                  title
                  description
                  created
                  swept_arguments
                  children {
                    #total_count
                    edges {
                      node {
                        child {
                          __typename
                          ... on Node {
                            id
                          }
                          ... on AutomationTaskInterface {
                            created
                            state
                            result
                            arguments {k v}
                          }
                        }
                      }
                    }
                  }
                }
              }
            }'''

        # print(qry)
        input_variables = dict(id=id)
        executed = self.run_query(qry, input_variables)

File ~/.virtualenvs/runzi/lib/python3.8/site-packages/nshm_toshi_client/toshi_client_base.py:69, in ToshiClientBase.run_query(self, query, variable_values)
     66 if self._with_schema_validation:
     67     self._client.validate(gql_query) #might throw graphql.error.base.GraphQLError
---> 69 response = self._client.execute(gql_query, variable_values)
     71 #logger.debug('response: %s', response)
     73 if response.get('errors') is None:

File ~/.virtualenvs/runzi/lib/python3.8/site-packages/gql/client.py:78, in Client.execute(self, document, *args, **kwargs)
     76 result = self._get_result(document, *args, **kwargs)
     77 if result.errors:
---> 78     raise Exception(str(result.errors[0]))
     80 return result.data