Fixing Python3

Syntax was still python2 only.

Change-Id: Ie378662686ddf49c0a31cd46ea0e660cc00c7604
Signed-off-by: beierl <mbeierl@vmware.com>
diff --git a/tools/OVF_converter/converter.py b/tools/OVF_converter/converter.py
index 5f31ed3..8c68947 100644
--- a/tools/OVF_converter/converter.py
+++ b/tools/OVF_converter/converter.py
@@ -464,7 +464,7 @@
         disk_controller_info = self.__read_yaml_file(DISK_CONTROLLER_INFO_FILE_PATH)
         try:
             if self.disk_controller and disk_controller_info:
-                for key, value in disk_controller_info.iteritems():
+                for key, value in disk_controller_info.items():
                     if self.disk_controller.lower() in key.lower():
                         disk_controller['controllerName'] = key
                         disk_controller['resourceType'] = str(value["ResourceType"])