Added getpeername method on RpcConnection class.

sjrpc/core/rpcconnection.py

@@ -406,3 +406,13 @@ class RpcConnection(object):
         '''
         
         return self._sock.fileno()
+
+    def getpeername(self):
+        '''
+        Get the peer name.
+
+        :return: string representing the peer name
+        '''
+
+        return '%s:%s' % self._sock.getpeername()
+