Fix image name for drone and name of stock_supply package

.drone.yml

@@ -1,4 +1,4 @@
-image: python2.7
+image: python:all
 env:
   - POSTGRESQL_URI=postgresql://postgres@127.0.0.1:5432/
   - MYSQL_URI=mysql://root@127.0.0.1:3306/

setup.py

@@ -53,7 +53,7 @@ for dep in info.get('depends', []):
         requires.append(get_require_version('trytond_%s' % dep))
 requires.append(get_require_version('trytond'))
 
-tests_require = [get_require_version('stock_supply'),
+tests_require = [get_require_version('trytond_stock_supply'),
     get_require_version('proteus')]
 dependency_links = []
 if minor_version % 2: