python2-jsonschema: Add python2-functools32 to inputs.

* gnu/packages/python.scm (python2-jsonschema)[inputs]: Add
python2-functools32.
(python2-wheel)[native-inputs]: Specify python2-jsonschema. Add
python2-functools32.
(python2-requests)[propagated-inputs]: Specify python2-wheel.
(python2-ipython)[inputs]: Specify python2-jsonschema, python2-requests.
(python2-rauth)[propagated-inputs]: Specify python2-requests.
* gnu/packages/openstack.scm (python2-requests-mock)[propagated-inputs]:
Specify python2-requests.
(python2-tempest-lib)[propagated-inputs]: Specify python2-jsonschema.
(python2-oslosphinx)[propagated-inputs]: Specify python2-requests.
(python2-keystoneclient)[porpagated-inputs]: Specify python2-requests.
[native-inputs]: Specify python2-oslosphinx, python2-requests-mock,
python2-tempest-lib.
(python2-swiftclient)[propagated-inputs]: Specify python2-requests,
python2-oslosphinx.