Fix support for Unicode volume names

It is possible to create a Unicode volume from the command line,
but it cannot be manipulated by name for operations such as delete.
This is because the find_resource function tries to match the
Unicode string to a regular byte string, and a UnicodeWarning is
issued, failing the match.  Fix by decoding the Unicode name when
trying to match.

Fixes bug 1065275.

Change-Id: I8e19a78bbc1ccb503ccd39dc3b904fc4f6f77858

cinderclient/utils.py

@@ -1,3 +1,4 @@
+import locale
 import os
 import re
 import sys
@@ -178,6 +179,13 @@ def find_resource(manager, name_or_id):
         try:
             return manager.find(name=name_or_id)
         except exceptions.NotFound:
+            try:
+                # For command-line arguments that are in Unicode
+                encoding = (locale.getpreferredencoding() or
+                            sys.stdin.encoding or
+                            'UTF-8')
+                return manager.find(display_name=(name_or_id.decode(encoding)))
+            except (UnicodeDecodeError, exceptions.NotFound):
                 try:
                     # Volumes does not have name, but display_name
                     return manager.find(display_name=name_or_id)