adding deprecation warning for getting upgrade price id from package items

Author: kwienken

SoftLayer/managers/vs.py

@@ -9,6 +9,7 @@
 import itertools
 import socket
 import time
+import warnings
 
 from SoftLayer import exceptions
 from SoftLayer.managers import ordering
@@ -901,6 +902,8 @@ def _get_price_id_for_upgrade(self, package_items, option, value,
         :param int value: The value of the parameter to be upgraded
         :param bool public: CPU will be in Private/Public Node.
         """
+        warnings.warn("use _get_price_id_for_upgrade_option() instead",
+                      DeprecationWarning)
         option_category = {
             'memory': 'ram',
             'cpus': 'guest_core',