Fix tests to make them pass on my box
Merge pull request #10 from trompette/test-fixes

Small test fixes : use "git remote rm" instead of "git remote remove" for compatibility with older Git versions, use $USER as login instead of "arno" for SSH tests

for reference, "git remote remove" was introduced by this Git commit : https://github.com/git/git/commit/e17dba8fe15028425acd6a4ebebf1b8e9377d3c6