Add dynamic fetch graph to query in GraphQLJpaSimpleDataFetcher

fixes #4

Author: igdianov

graphql-jpa-query-schema/src/main/java/com/introproventures/graphql/jpa/query/schema/impl/GraphQLJpaSimpleDataFetcher.java

@@ -42,7 +42,7 @@ public Object get(DataFetchingEnvironment environment) {
                 EntityGraph<?> entityGraph = buildEntityGraph(field);
 
                 return super.getQuery(environment, field, true)
-                    //.setHint("javax.persistence.fetchgraph", entityGraph)
+                    .setHint("javax.persistence.fetchgraph", entityGraph)
                     .getSingleResult();
 
             } catch (NoResultException ignored) {

graphql-jpa-query-schema/src/test/java/com/introproventures/graphql/jpa/query/schema/StarwarsQueryExecutorTests.java

@@ -216,10 +216,10 @@ public void queryDeepNesting() {
 
         String expected = "{Droid={name=R2-D2, friends=["
             + "{name=Leia Organa, appearsIn=[A_NEW_HOPE, EMPIRE_STRIKES_BACK, RETURN_OF_THE_JEDI, THE_FORCE_AWAKENS], friends=[{name=C-3PO}, {name=R2-D2}, {name=Han Solo}, {name=Luke Skywalker}]}, "
-            + "{name=Han Solo, appearsIn=[A_NEW_HOPE, EMPIRE_STRIKES_BACK, RETURN_OF_THE_JEDI, THE_FORCE_AWAKENS], friends=[{name=Leia Organa}, {name=R2-D2}, {name=Luke Skywalker}]}, "
-            + "{name=Luke Skywalker, appearsIn=[A_NEW_HOPE, EMPIRE_STRIKES_BACK, RETURN_OF_THE_JEDI, THE_FORCE_AWAKENS], friends=[{name=C-3PO}, {name=Leia Organa}, {name=R2-D2}, {name=Han Solo}]}"
-            + "]}}";
-        
+            + "{name=Han Solo, appearsIn=[A_NEW_HOPE, EMPIRE_STRIKES_BACK, RETURN_OF_THE_JEDI, THE_FORCE_AWAKENS], friends=[{name=R2-D2}, {name=Leia Organa}, {name=Luke Skywalker}]}, "
+            + "{name=Luke Skywalker, appearsIn=[A_NEW_HOPE, EMPIRE_STRIKES_BACK, RETURN_OF_THE_JEDI, THE_FORCE_AWAKENS], friends=[{name=C-3PO}, {name=R2-D2}, {name=Leia Organa}, {name=Han Solo}]}"
+            + "]}}"; 
+            
         //when:
         Object result = executor.execute(query).getData();