Add back json_loads function

This was getting imported by direct_client.py in swift < 1.13.0.
Without it, account and container servers (among other things,
most likely) would refuse to start, spewing errors like

   Error trying to load config from /etc/swift/account-server.conf:
   cannot import name json_loads

Merge "Add other-requirements.txt"

This branch (stable/kilo) is at End Of Life

python-swiftclient 3.0.0 release

meta:version: 3.0.0
meta:series: mitaka
meta:release-type: release
meta:announce: openstack-announce@lists.openstack.org
meta:pypi: yes
meta:first: no

python-swiftclient 2.7.0 release

meta:version: 2.7.0
meta:series: mitaka
meta:release-type: release

Juno EOL

python-swiftclient 2.6.0 release

python-swiftclient 2.3.2 release

python-swiftclient 2.5.0 release

2.4.0 release