Fix processutils.execute errors on windows

Added a check for existence of geteuid.

This fix is related to oslo-incubator commit:
d6a963e911b8456c06dceb5ee3cc88a70c08bf82

Closes-Bug: #1209410

Change-Id: Ibaa1f061bf161768890d4708dc945180121726f9

nova/openstack/common/processutils.py

@@ -132,7 +132,7 @@ def execute(*cmd, **kwargs):
         raise UnknownArgumentError(_('Got unknown keyword args '
                                      'to utils.execute: %r') % kwargs)
 
-    if run_as_root and os.geteuid() != 0:
+    if run_as_root and hasattr(os, 'geteuid') and os.geteuid() != 0:
         if not root_helper:
             raise NoRootWrapSpecified(
                 message=('Command requested root, but did not specify a root '