Remove volumes from drone and fix test

.drone.yml

@@ -13,8 +13,6 @@ pipeline:
         commands:
             - pip install tox
             - tox -e "${TOXENV}-${DATABASE}"
-        volumes:
-            - cache:/root/.cache
 
 services:
     postgresql:

setup.py

@@ -50,7 +50,7 @@ for dep in info.get('depends', []):
         requires.append(get_require_version('%s_%s' % (prefix, dep)))
 requires.append(get_require_version('trytond'))
 
-tests_require = [get_require_version('proteus')]
+tests_require = []
 dependency_links = []
 if minor_version % 2:
     # Add development index for testing with proteus
@@ -117,7 +117,4 @@ setup(name='%s_%s' % (PREFIX, MODULE),
     test_loader='trytond.test_loader:Loader',
     tests_require=tests_require,
     use_2to3=True,
-    convert_2to3_doctests=[
-        'tests/scenario_account_reconcile_different_party.rst',
-        ],
     )

tests/__init__.py

@@ -1,6 +1,9 @@
 # This file is part of account_reconcile_different_party module for Tryton.
 # The COPYRIGHT file at the top level of this repository contains
 # the full copyright notices and license terms.
-from .test_account_reconcile_different_party import suite
+try:
+    from trytond.modules.account_reconcile_different_party.tests.test_account_reconcile_different_party import suite
+except ImportError:
+    from .test_account_reconcile_different_party import suite
 
 __all__ = ['suite']