Task #10057: always return disk_usage_readable

SAS/DataManagement/StorageQueryService/cache.py

@@ -428,6 +428,7 @@ class CacheManager:
                 if not self.disk_usage.path_resolver.pathExists(path):
                     result['message'] = 'No such path: %s' % path
 
+        result['disk_usage_readable'] = humanreadablesize(result['disk_usage'])
         logger.info('cache.getDiskUsageForPath result: %s' % result)
         return result