Updated test jawn to use the lastest version of the framework (#3961)

* Update build.gradle

* updated framework, now using postgresql

* new version of the jawn framework

* Update benchmark_config.json

* update to newest gradle wrapper

* actually perform the update!

* updated framework

frameworks/Java/jawn/build.gradle

@@ -19,7 +19,7 @@ repositories {
 
 dependencies {
     // Framework
-    def framework_version = '0.9.10'
+    def framework_version = '0.9.12'
     compile "net.javapla.jawn:jawn:${framework_version}"