Fix gh-2702 and add `Introspection.__DirectiveLocation` regression tests#2703

bbakerman merged 2 commits intographql-java:mastergraphql-java/graphql-java:masterfrom

jord1e:fix-2702-directive-introspection-typojord1e/graphql-java:fix-2702-directive-introspection-typoCopy head branch name to clipboard