Add a couple extra subscription tests for early errors
Add a couple extra subscription tests for early errors

tgriesser/graphql-js,tgriesser/graphql-js,enaqx/graphql-js,jjergus/graphql-js,graphql/graphql-js,graphql/graphql-js,jjergus/graphql-js,graphql/graphql-js,enaqx/graphql-js,enaqx/graphql-js