[FIX] test-folder-imported: check if node has a modname as attribute

In python versions above 3.5, an error occurs when try to get 'modname' from node.

pylint_odoo/checkers/modules_odoo.py

@@ -366,11 +366,14 @@ def check_odoo_relative_import(self, node):
 
     def check_folder_test_imported(self, node):
         if (hasattr(node.parent, 'file')
-            and os.path.basename(node.parent.file) == '__init__.py'
-            and ("tests" in [item for item, _ in node.names]
-                 or "tests" in node.modname)):
-            self.add_message('test-folder-imported', node=node,
-                             args=(node.parent.name,))
+            and os.path.basename(node.parent.file) == '__init__.py'):
+            if isinstance(node, astroid.ImportFrom): 
+                package_names = node.modname.split('.')[:1] 
+            elif isinstance(node, astroid.Import):
+                package_names = [name[0].split('.')[0] for name in node.names]
+            if "tests" in package_names:
+                self.add_message('test-folder-imported', node=node,
+                                args=(node.parent.name,))
 
     @staticmethod
     def _is_absolute_import(node, name):

pylint_odoo/test/main.py

@@ -43,8 +43,8 @@
     'method-inverse': 1,
     'method-required-super': 8,
     'method-search': 1,
-    'missing-import-error': 7,
-    'missing-manifest-dependency': 5,
+    'missing-import-error': 8,
+    'missing-manifest-dependency': 6,
     'missing-newline-extrafiles': 4,
     'missing-readme': 1,
     'missing-return': 1,

pylint_odoo/test_repo/eleven_module/__init__.py

@@ -1,3 +1,3 @@
 from . import models
 from . import utf8_models
-from .tests import test_model1
+import tests