Allow unit tests access to global packages

requirements.txt

@@ -2,5 +2,4 @@
 # 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
-pytango>=9.3.0 # LGPL
+pbr>=2.0 # Apache-2.0
\ No newline at end of file
\ No newline at end of file

tox.ini

@@ -5,6 +5,7 @@ skipsdist = True
 
 [testenv]
 usedevelop = True
+sitepackages = True
 install_command = pip3 install {opts} {packages}
 setenv =
    VIRTUAL_ENV={envdir}