feat(java): raise max payload size to 1MB

Author: buongarzoni

rollbar-java/src/integTest/java/com/rollbar/notifier/RollbarITest.java

@@ -352,7 +352,7 @@ public void ifPayloadIsTooLargeItShouldBeTruncated() {
     assertThat(frames, hasSize(20));
 
     assertThat(PayloadTruncator.sizeInBytes(payloadJsonString),
-        lessThanOrEqualTo(512 * 1024));
+        lessThanOrEqualTo(1024 * 1024));
   }
 
   protected Sender buildSender(String url, String accessToken, Proxy proxy) {

rollbar-java/src/main/java/com/rollbar/notifier/RollbarBase.java

@@ -36,7 +36,7 @@
 public abstract class RollbarBase<RESULT, C extends CommonConfig> {
 
   private static final Logger LOGGER = LoggerFactory.getLogger(RollbarBase.class);
-  private static final int MAX_PAYLOAD_SIZE_BYTES = 512 * 1024; // 512kb
+  private static final int MAX_PAYLOAD_SIZE_BYTES = 1024 * 1024; // 1mb
 
   protected BodyFactory bodyFactory;
   protected PayloadTruncator payloadTruncator;