change int to integer for maxresults (#447)

Author: AkifRafique

src/main/java/software/amazon/cloudformation/proxy/HandlerRequest.java

@@ -29,7 +29,7 @@ public class HandlerRequest<ResourceT, CallbackT, ConfigurationT> {
     private String awsAccountId;
     private String bearerToken;
     private String nextToken;
-    private int maxResults;
+    private Integer maxResults;
     private String region;
     private String resourceType;
     private String resourceTypeVersion;

src/main/java/software/amazon/cloudformation/proxy/ResourceHandlerRequest.java

@@ -51,5 +51,5 @@ public class ResourceHandlerRequest<T> {
     private Map<String, Object> creationPolicy;
     private String region;
     private String stackId;
-    private int maxResults;
+    private Integer maxResults;
 }