Try to resolve tango requirements for CI

requirements.txt

@@ -2,4 +2,5 @@
 # of appearance. Changing the order has an impact on the overall integration
 # process, which may cause wedges in the gate later.
 
-pbr>=2.0 # Apache-2.0
\ No newline at end of file
+pbr>=2.0 # Apache-2.0
+pytango>=9.3.0 # LGPL
\ No newline at end of file

tox.ini

@@ -13,6 +13,7 @@ setenv =
    OS_STDERR_CAPTURE=1
    OS_TEST_TIMEOUT=60
 deps = -r{toxinidir}/test-requirements.txt
+    -r{toxinidir}/docker-compose/lofar-device-base/lofar-requirements.txt
 commands = stestr run {posargs}
 
 [testenv:pep8]