Addresses Python SDK issue reported by [sathiyamoorthy](http://answers.splunk.com/users/166464/sathiyamoorthy)

See [problem-with-python-splunk-sdk-autologin](http://answers.splunk.com/answers/122881/problem-with-python-splunk-sdk-autologin)

Here's the repro:

1. Enter these statements into the Python REPL

    ```
    import splunklib.client as splunkclient
    splunk_service = splunkclient.connect(host='localhost', port=8089, username='admin', password='changeme', autologin=True)
    splunk_service.jobs.oneshot("search index=myindex", earliest_time='-1hour')
    ```

2. Restart Splunk

3. Enter this statement into the Python REPL

    ```
    splunk_service.jobs.oneshot("search index=myindex", earliest_time='-1hour')
    ```

    **Expected:** Autologin

    **Observed:** Exception

TODO: Test that covers this scenario.
Signed-off-by: David Noble <dnoble@splunk.com>
DVPL-4073: Develop test for problem with python splunk sdk autologin

Confirmed locally:

+ Binding.py, line 248 hit by test.
+ Autologin after service restart works with change.

Signed-off-by: David Noble <dnoble@splunk.com>
Updated change log and read me for the splunk-sdk-python-1.2.2 release.

Signed-off-by: David Noble <dnoble@splunk.com>
Bumped version number.
Release 1.2.2