L2SS-556: Ensure tox docs job also uses base requirements cleanly

docker-compose/lofar-device-base/lofar-requirements.txt

 # Do not put tangostationcontrol dependencies here, only setup.py / __init__.py
-GitPython >= 3.1.24 # BSD
+GitPython >= 3.1.20 # BSD

tangostationcontrol/setup-requirements.txt

-GitPython >= 3.1.20 # BSD
\ No newline at end of file

tangostationcontrol/tox.ini

@@ -14,9 +14,8 @@ setenv =
    OS_STDERR_CAPTURE=1
    OS_TEST_TIMEOUT=60
 deps =
-    -r{toxinidir}/setup-requirements.txt
-    -r{toxinidir}/test-requirements.txt
     -r{toxinidir}/../docker-compose/lofar-device-base/lofar-requirements.txt
+    -r{toxinidir}/test-requirements.txt
 commands = stestr run {posargs}
 
 [testenv:integration]
@@ -44,7 +43,7 @@ commands =
 
 [testenv:docs]
 deps =
-    -r{toxinidir}/setup-requirements.txt
+    -r{toxinidir}/../docker-compose/lofar-device-base/lofar-requirements.txt
     -r{toxinidir}/docs/docs-requirements.txt
 commands =
     sphinx-build -W -b html docs/source docs/build/html