Fix java init template

Fixes #711

Seems like jsii stopped generating method overloads
which is the reason some of the method signatures
caused compilation errors.

Also, IIdentityResource was renamed to IPrincipal.

We should revisit once aws/jsii#233 is fixed.

But at least we want to make sure the init template
compiles.

packages/aws-cdk/lib/init-templates/app/java/src/main/java/com/myorg/HelloConstruct.java

@@ -1,8 +1,9 @@
 package com.myorg;
 
 import software.amazon.awscdk.Construct;
-import software.amazon.awscdk.services.iam.IIdentityResource;
+import software.amazon.awscdk.services.iam.IPrincipal;
 import software.amazon.awscdk.services.s3.Bucket;
+import software.amazon.awscdk.services.s3.BucketProps;
 
 import java.util.ArrayList;
 import java.util.List;
@@ -17,15 +18,15 @@ public HelloConstruct(final Construct parent, final String name, final HelloCons
         super(parent, name);
 
         for (int i = 0; i < props.getBucketCount(); ++i) {
-            buckets.add(new Bucket(this, "Bucket" + String.valueOf(i)));
+            buckets.add(new Bucket(this, "Bucket" + String.valueOf(i), BucketProps.builder().build()));
         }
     }
 
     /**
      * Given an principal, grants it READ access on all buckets.
      * @param principal The principal (User, Group, Role)
      */
-    public void grantRead(final IIdentityResource principal) {
-        buckets.forEach(b -> b.grantRead(principal));
+    public void grantRead(final IPrincipal principal) {
+        buckets.forEach(b -> b.grantRead(principal, "*"));
     }
 }

packages/aws-cdk/lib/init-templates/app/java/src/main/java/com/myorg/HelloStack.java

@@ -4,6 +4,7 @@
 import software.amazon.awscdk.Stack;
 import software.amazon.awscdk.StackProps;
 import software.amazon.awscdk.services.iam.User;
+import software.amazon.awscdk.services.iam.UserProps;
 import software.amazon.awscdk.services.sns.Topic;
 import software.amazon.awscdk.services.sns.TopicProps;
 import software.amazon.awscdk.services.sqs.Queue;
@@ -31,7 +32,7 @@ public HelloStack(final App parent, final String name, final StackProps props) {
                 .withBucketCount(5)
                 .build());
 
-        User user = new User(this, "MyUser");
+        User user = new User(this, "MyUser", UserProps.builder().build());
         hello.grantRead(user);
     }
 }