Restore functionality for early gits (#7775) (#8476)

* Change tests to make it possible to run TestGit with 1.7.2

* Make merge run on 1.7.2

* Fix tracking and staging branch name problem

* Ensure that git 1.7.2 works on tests

* ensure that there is no chance for conflicts

* Fix-up missing merge issues

* Final rm

* Ensure LFS filters run on the tests

* Do not sign commits from temp repo

* Apply suggestions from code review

* Update modules/repofiles/temp_repo.go

integrations/lfs_getobject_test.go

@@ -58,6 +58,11 @@ func storeObjectInRepo(t *testing.T, repositoryID int64, content *[]byte) string
 
 func doLfs(t *testing.T, content *[]byte, expectGzip bool) {
 	prepareTestEnv(t)
+	setting.CheckLFSVersion()
+	if !setting.LFS.StartServer {
+		t.Skip()
+		return
+	}
 	repo, err := models.GetRepositoryByOwnerAndName("user2", "repo1")
 	assert.NoError(t, err)
 	oid := storeObjectInRepo(t, repo.ID, content)