python-keyring: update to work with current gnome keyring

The python keyring module was updated to version 4.0 (boo#901066):
* Removed ``keyring_path`` parameter from ``load_keyring``. See release notes
for 3.0.3 for more details.
* Issue #22: Removed support for loading the config from the current
directory. The config file must now be located in the platform-specific
config location.
* Issue #22: Deprecated loading of config from current directory. Support for
loading the config in this manner will be removed in a future version.
* Issue #131: Keyring now will prefer ``pywin32-ctypes
``_ to pywin32 if available.
* Gnome keyring no longer relies on the GNOME_KEYRING_CONTROL environment
variable.
* Issue #140: Restore compatibility for older versions of PyWin32.

Fixed bugs
bnc#901066
python-keyring is too old to use Gnome keyring backend
Selected Binaries
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