debian: Remove python3-requests from depends list

Requests library is still used by functional tests.

- Add requests as test dependency in setup.py.

- Keep python3-requests are build dependency in debian/control

Signed-off-by: Sunil Mohan Adapa <sunil@medhas.org>
Reviewed-by: James Valleroy <jvalleroy@mailbox.org>

debian/control

@@ -99,7 +99,6 @@ Depends:
  python3-gi,
  python3-paramiko,
  python3-psutil,
- python3-requests,
  python3-ruamel.yaml,
  python3-yaml,
  sudo,

setup.py

@@ -273,6 +273,7 @@ setuptools.setup(
         'pytest-cov',
         'pytest-django',
         'flake8',
+        'requests',
     ],
     package_data={
         '': ['templates/*', 'static/*', 'locale/*/LC_MESSAGES/*.[pm]o']