Fix for broken test.

Issue was that nothing was actually using the `javax.annotation` module in the project, i.e. a bug in the test project.  For some reason updating the Kotlin jars caused the issue to be displayed.  Fixed by having a module depend on the module. Also added a use of one of the types from one of the patched jars to ensure it working.

Author: big-andy-coates

test-project-kotlin/greeter.provider/src/main/java/module-info.java

@@ -3,5 +3,6 @@
 module greeter.provider {
     requires greeter.api;
     requires kotlin.stdlib;
+    requires java.annotation;
     provides Greeter with examples.greeter.Friendly;
 }

test-project-kotlin/greeter.provider/src/main/kotlin/examples/greeter/Friendly.kt

@@ -2,7 +2,9 @@ package examples.greeter
 
 import examples.greeter.api.Greeter
 import java.io.*
+import javax.annotation.concurrent.Immutable;
 
+@Immutable
 class Friendly: Greeter {
     override fun hello(): String {
         val stream = javaClass.getResourceAsStream("/greeting.txt")