manifests: remove .git extension in paths or names

Change-Id: Ic4d69669bd8eab5dd61f5803a11f0c4baa14a7de
Signed-off-by: Stephane Desneux <stephane.desneux@open.eurogiciel.org>
Merge branch 'master' of git.vannes:/srv/git/gitcache/github.com//ronan22/TizenManifestManager