Throw exception if RequestToken does not return an oauth_token

Author: SidneyAllen

src/main/java/com/xero/api/OAuthGetTemporaryToken.java

@@ -83,6 +83,10 @@ public final OAuthCredentialsResponse execute() throws IOException,XeroApiExcept
     				UrlEncodedParser.parse(content, oauthResponse); 
 
     				int code = response.getStatusLine().getStatusCode();
+    				if (oauthResponse.token == null) {
+    					XeroApiException e = new XeroApiException(400,content);
+		        		throw e;
+		        }
     				if (code != 200) {
     					XeroApiException e = new XeroApiException(code,content);
 		        		throw e;

src/main/java/com/xero/api/XeroClientException.java

@@ -12,7 +12,6 @@ public class XeroClientException extends RuntimeException {
 	 * 
 	 */
 	private static final long serialVersionUID = 1L;
-
 	/**
      * Create new exception.
      *
@@ -31,5 +30,5 @@ public XeroClientException(String message) {
     public XeroClientException(String message, Throwable cause) {
         super(message, cause);
     }
-
+   
 }