Allow to fetch name for mock virtual machine to fix tests in 183

idea/tests/org/jetbrains/kotlin/idea/debugger/MockVirtualMachine.java

@@ -159,7 +159,7 @@ public class MockVirtualMachine implements VirtualMachine {
 
     @Override
     public String name() {
-        throw new UnsupportedOperationException();
+        return "JVM mock";
     }
 
     @Override