Currently glanceclient doesn't support non-ASCII characters for images
names and properties (names and values as well). This patch introduces 2
functions (utils.py) that will help encoding and decoding strings in a
more "secure" way.
About the ensure_(str|unicode) functions:
They both try to use first the encoding used in stdin (or python's
default encoding if that's None) and fallback to utf-8 if those
encodings fail to decode a given text.
About the changes in glanceclient:
The major change is that all inputs will be decoded and will kept as
such inside the client's functions and will then be encoded before
being printed / sent out the client.
There are other small changes, all related to encoding to str,
around in order to avoid fails during some conversions. i.e: quoting
url encoded parameters.
Fixes bug: 1061150
Change-Id: I5c3ea93a716edfe284d19f6291d4e36028f91eb2
55cb4f4473