Set the framework to Vert.x (#5798)

Currently the framework is set to _None_ which does not reflect the nature of the framework properly in composite results. This should be changed to _Vert.x_ instead to consolidate the results properly.

frameworks/Java/vertx/benchmark_config.json

@@ -8,7 +8,7 @@
       "approach": "Realistic",
       "classification": "Platform",
       "database": "None",
-      "framework": "None",
+      "framework": "Vert.x",
       "language": "Java",
       "flavor": "None",
       "orm": "Raw",
@@ -29,7 +29,7 @@
       "approach": "Realistic",
       "classification": "Platform",
       "database": "Postgres",
-      "framework": "None",
+      "framework": "Vert.x",
       "language": "Java",
       "flavor": "None",
       "orm": "Raw",