Tests: expose 'args' passed to hook scripts

- Useful to validate that all the expected arguments were passed with
  correct escaping.
- Update test/template.t with one use-case for 'args'

test/hooks.env.t

@@ -29,7 +29,6 @@
 import sys
 import os
 import unittest
-from datetime import datetime
 # Ensure python finds the local simpletap module
 sys.path.append(os.path.dirname(os.path.abspath(__file__)))
 
@@ -63,6 +62,7 @@ class TestHooksOnLaunch(TestCase):
         self.assertEqual('data'    in taskenv, True, 'data:...')
         self.assertEqual('version' in taskenv, True, 'version:...')
 
+
 if __name__ == "__main__":
     from simpletap import TAPTestRunner
     unittest.main(testRunner=TAPTestRunner())