Remove '-.*' from the end of git-annex version strings.

[pcreech]

RPMs provided by git-annex have a '-{hash}' added to the version, breaking version detection.

This was the simplest way I could come up with to get around this issue, based on what was already implemented.

[pcreech]

The git-annex rpm repo I'm using is:

[git-annex]
name=git-annex repository
baseurl=https://downloads.kitenet.net/git-annex/linux/current/rpms/
enabled=0
gpgcheck=0

[pcreech]

thinking about it, the removing '-.*' might better belong in the git annex builder, as the version is being passed in.

[FrostyX]

Hello @pcreech,
sorry for the late reply.

I like the PR, and I would keep the change where it is. Can you please add these two asserts into common_tests.py:test_compare_versions?

self.assertEquals(0, compare_version("1.0-abc", "1.0-xyz"))
self.assertTrue(compare_version("1.1-abc", "1.0-xyz"))