openstack/swift - swift - OpenDev: Free Software Needs Free Tools

This makes it a lot easier for CI jobs to be setup and return the true
status of the testsuite.
Change-Id: I0c2b0d6b17f560a889cd2f22ab98a68361f6d738

Change-Id: I081d853a90ad0efce5b7a20b52794ce3348a9617

* Adds tox config
 - based on the config from python-quantumclient and updated for
 test, pep8 and coverage execution as per nova's run_tests.sh.
 * Adds nosetests defaults in setup.cfg
 * Adds runtime dependencies in tools/pip-requires
 - dependencies were gathered by referencing the packages used in
 creation of a Swift All In One. Versions were determined by
 checking the swift-core/trunk ppa or, failing that, the version
 available in lucid.
 * Adds test dependencies in tools/test-requires
 * Updates swift/common/middleware/formpost.py for pep8 compliance
 * Adds instructions for executing the tests with Tox to the
 developer_guidelines
 * Adds instructions for installing openstack.nose_plugin to
 developer_saio
 * Fixes bug 909177
Change-Id: I5407924d2181e9ab335aaf76bf30c8d40deccbb4

When running .functests or .unittests allow to pass argument on the
command line for nosetests.
Fixes bug 925636
Change-Id: Icb07c192328528900b502fbc937b9c83f70a4b0f