Increase hacking version

Let's use hacking 2.0 to get newer Python3 pep8.
Fix the one error found (E305: expected two lines...).

Change-Id: Iebe51ede1e80ce256a1f6015746e8ed62a3d946b

roles/prepare-zanata-client/files/get-modulename.py

@@ -108,5 +108,6 @@ def main():
     if modules:
         print(' '.join(modules))
 
+
 if __name__ == '__main__':
     main()

test-requirements.txt

@@ -2,7 +2,7 @@
 # of appearance. Changing the order has an impact on the overall integration
 # process, which may cause wedges in the gate later.
 
-hacking>=1.1.0,<1.2 # Apache-2.0
+hacking>=2.0.0,<2.1 # Apache-2.0
 
 zuul
 ansible>=2.7.0,<2.8