fix(boxsdkgen): Fix error propagation in Java (box/box-codegen#936)

.codegen.json

@@ -1 +1 @@
-{ "engineHash": "acae1d5", "specHash": "f8e0d99", "version": "5.6.0" }
+{ "engineHash": "51c2138", "specHash": "f8e0d99", "version": "5.6.0" }

docs/sdkgen/authentication.md

@@ -215,8 +215,9 @@ browser or web view) in order to obtain an auth code.
 <!-- sample get_authorize -->
 
 ```java
-BoxOAuth oauth = new OAuthConfig("CLIENT_ID", "CLIENT_SECRET");
-String authorizationUrl = auoauthth.getAuthorizeUrl();
+OAuthConfig oauthConfig = new OAuthConfig("CLIENT_ID", "CLIENT_SECRET");
+BoxOAuth oauth = new BoxOAuth(oauthConfig);
+String authorizationUrl = oauth.getAuthorizeUrl();
 ```
 
 After a user logs in and grants your application access to their Box account,

src/main/java/com/box/sdkgen/networking/boxnetworkclient/BoxNetworkClient.java

@@ -196,6 +196,8 @@ public FetchResponse fetch(FetchOptions options) {
         exceptionThrown = e;
         numberOfRetriesOnException++;
         attemptForRetry = numberOfRetriesOnException;
+        fetchResponse = new FetchResponse.Builder(0, new TreeMap<>()).build();
+        rawResponseBody = null;
         if (response != null) {
           response.close();
         }

src/main/java/com/box/sdkgen/networking/defaultnetworkclient/DefaultNetworkClient.java

@@ -113,12 +113,10 @@ public FetchResponse fetch(FetchOptions options) {
         exceptionThrown = e;
         numberOfRetriesOnException++;
         attemptForRetry = numberOfRetriesOnException;
+        fetchResponse = new FetchResponse.Builder(0, new TreeMap<>()).build();
         if (response != null) {
           response.close();
         }
-
-        fetchResponse =
-            new FetchResponse.Builder(0, new TreeMap<>(String.CASE_INSENSITIVE_ORDER)).build();
       }
 
       shouldRetry =