Updated to add metadata for Conditionals

Also renamed camel-cased properties to cononical format.

resolves #442

spring-cloud-task-stream/src/main/resources/META-INF/additional-spring-configuration-metadata.json

@@ -0,0 +1,10 @@
+{
+  "properties": [
+    {
+      "defaultValue": "true",
+      "name": "spring.cloud.task.events.enabled",
+      "description": "This property is used to determine if a task app should emit task events.",
+      "type": "java.lang.Boolean"
+    }
+  ]
+}