Merge pull request #280 from setchy/master

(deps) update to graphql-java 17.2 (contains several bug fixes)

Author: yarinvak

build.gradle

@@ -54,7 +54,7 @@ gradle.projectsEvaluated {
 
 dependencies {
     compile 'javax.validation:validation-api:1.1.0.Final'
-    compile 'com.graphql-java:graphql-java:17.1'
+    compile 'com.graphql-java:graphql-java:17.2'
     compile 'com.graphql-java:graphql-java-extended-scalars:17.0'