Parse exception from SDK

Some exceptions from SDK are not in stardard json format,
this patch parse it to json.

Change-Id: If39704f24b084cd1f6aaccd3c951636a53f3ddc1
Partial-Bug: #1472557

senlinclient/common/exc.py

@@ -231,7 +231,12 @@ def parse_exception(exc):
     :param details: details of the exception.
     '''
     if isinstance(exc, sdkexc.HttpException):
-        record = jsonutils.loads(exc.details)
+        record = {
+            'error': {
+                'code': exc.status_code,
+                'message': exc.details,
+            }
+        }
     elif isinstance(exc, reqexc.RequestException):
         # Exceptions that are not captured by SDK
         code = exc.message[1].errno