boilerplate_test:fix pylint warnings

Fixed the following Pylint warnings:

boilerplate_test.py:34:8: R0205: Class 'Args' inherits from object, can be safely removed from bases in python3 (useless-object-inheritance)
boilerplate_test.py:46:8: W0612: Unused variable 'ret' (unused-variable)
boilerplate_test.py:18:0: C0411: standard import "import unittest" should be placed before "import boilerplate" (wrong-import-order)
boilerplate_test.py:19:0: C0411: standard import "from io import StringIO" should be placed before "import boilerplate" (wrong-import-order)
boilerplate_test.py:20:0: C0411: standard import "import os" should be placed before "import boilerplate" (wrong-import-order)
boilerplate_test.py:21:0: C0411: standard import "import sys" should be placed before "import boilerplate" (wrong-import-order)

hack/boilerplate/boilerplate_test.py

@@ -14,12 +14,13 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import boilerplate
-import unittest
-from io import StringIO
 import os
 import sys
+import unittest
 
+from io import StringIO
+
+import boilerplate
 
 class TestBoilerplate(unittest.TestCase):
     """
@@ -31,19 +32,19 @@ class TestBoilerplate(unittest.TestCase):
     def test_boilerplate(self):
         os.chdir("test/")
 
-        class Args(object):
-            def __init__(self):
-                self.filenames = []
-                self.rootdir = "."
-                self.boilerplate_dir = "../"
-                self.verbose = True
+        class Args:
+            filenames = []
+            rootdir = "."
+            boilerplate_dir = "../"
+            verbose = True
 
         # capture stdout
         old_stdout = sys.stdout
         sys.stdout = StringIO()
 
-        boilerplate.args = Args()
+        boilerplate.args = Args
         ret = boilerplate.main()
+        self.assertEqual(ret, 0)
 
         output = sorted(sys.stdout.getvalue().split())