Reviewers: awiner, louiscryan,
Description:
https://issues.apache.org/jira/browse/SHINDIG-1028
Json RPC spec optionally allows server to send "data" section in error
cases. This change makes this possible in shindig.
Please review this at http://codereview.appspot.com/51042
Affected files:
java/common/src/main/java/org/apache/shindig/protocol/ApiServlet.java
java/common/src/main/java/org/apache/shindig/protocol/JsonRpcServlet.java
java/common/src/main/java/org/apache/shindig/protocol/ProtocolException.java
java/common/src/main/java/org/apache/shindig/protocol/ResponseItem.java
java/common/src/test/java/org/apache/shindig/protocol/JsonRpcServletTest.java
java/social-api/src/main/java/org/apache/shindig/social/opensocial/spi/SocialSpiException.java