Change test_refspec to manualtest

BUG=skia:2682
R=epoger@google.com

Author: rmistry@google.com

Review URL: https://codereview.chromium.org/474293002

py/utils/git_utils_manualtest.py

diff --git a/py/utils/git_utils_test.py b/py/utils/git_utils_manualtest.py
similarity index 99%
rename from py/utils/git_utils_test.py
rename to py/utils/git_utils_manualtest.py
index 88a2736..720a9e9 100755
--- a/py/utils/git_utils_test.py
+++ b/py/utils/git_utils_manualtest.py
@@ -99,5 +99,6 @@
   if not results.wasSuccessful():
     raise Exception('failed unittest %s' % test_case_class)
 
+
 if __name__ == '__main__':
   main(NewGitCheckoutTest)