adding test to check git hash

Author: djarecka

nipype/tests/test_nipype.py

@@ -1,4 +1,5 @@
 from .. import get_info
+from ..info import get_nipype_gitversion
 
 
 def test_nipype_info():
@@ -10,5 +11,6 @@ def test_nipype_info():
     assert exception_not_raised
 
 
-# def test_fail_always():
-#     assert False
+def test_git_hash():
+    #removing the first "g" from gitversion
+    get_nipype_gitversion()[1:] == get_info()['commit_hash']