[all] pylint refinements

Improve code by bringing up the pylint score a bit.

see #23

tests/modules/test_modules.py

@@ -3,8 +3,7 @@
 import unittest
 import importlib
 
-from bumblebee.modules.cpu import Module
-from bumblebee.engine import modules
+from bumblebee.engine import all_modules
 from bumblebee.config import Config
 from tests.util import assertWidgetAttributes, MockEngine
 
@@ -13,9 +12,9 @@ class TestGenericModules(unittest.TestCase):
         engine = MockEngine()
         config = Config()
         self.objects = {}
-        for mod in modules():
+        for mod in all_modules():
             cls = importlib.import_module("bumblebee.modules.{}".format(mod["name"]))
-            self.objects[mod["name"]] = getattr(cls, "Module")(engine, { "config": config })
+            self.objects[mod["name"]] = getattr(cls, "Module")(engine, {"config": config})
 
     def test_widgets(self):
         for mod in self.objects:

tests/test_module.py

@@ -19,7 +19,7 @@ class TestModule(unittest.TestCase):
         self.anyConfigName = "cfg"
         self.anotherConfigName = "cfg2"
         self.anyModule = Module(engine=None, widgets=self.widget, config={
-            "name": self.anyConfigName, "config": self.config   
+            "name": self.anyConfigName, "config": self.config
         })
         self.anotherModule = Module(engine=None, widgets=self.widget, config={
             "name": self.anotherConfigName, "config": self.config