Depend on teklia-document-processing PyPi package

Refs https://redmine.teklia.com/issues/6260

Need: !82 (merged)

tox.ini

 [tox]
 env_list =
-    atr-data-generator
+  atr-data-generator
 minversion = 4.4.7
 
 [testenv]
@@ -13,11 +13,12 @@ deps =
   pytest-lazy-fixture
   pytest-responses
   pytest-mock
-  ./document-processing
   -rrequirements.txt
-
 commands =
-    pytest {tty:--color=yes} {posargs}
+  pytest {tty:--color=yes} {posargs}
+
+setenv =
+  PIP_INDEX_URL=https://gitlab.teklia.com/api/v4/projects/149/packages/pypi/simple
 
 [pytest]
 testpaths = tests