Fix lightweight tags not processed correctly by GitTagPushService22271-drone-tag-pipeline-build

When we updated gitlab_git to 10.4.1, `tag.target` changed from pointing
to the sha of the tag to the sha of the commit the tag points to. The
problem is that only annotated tags have `object_sha`s, lightweight tags
don't (it's nil), so (only) in their case we still need to use
`tag.target`.

2 files changed, 2 insertions, 2 deletions

diff --git a/spec/finders/branches_finder_spec.rb b/spec/finders/branches_finder_spec.rb
index 6fce11de30f..db60c01db0d 100644
--- a/spec/finders/branches_finder_spec.rb
+++ b/spec/finders/branches_finder_spec.rb
@@ -21,7 +21,7 @@ describe BranchesFinder do
         result = branches_finder.execute
 
         recently_updated_branch = repository.branches.max do |a, b|
-          repository.commit(a.target).committed_date <=> repository.commit(b.target).committed_date
+          repository.commit(a.dereferenced_target).committed_date <=> repository.commit(b.dereferenced_target).committed_date
         end
 
         expect(result.first.name).to eq(recently_updated_branch.name)
diff --git a/spec/finders/tags_finder_spec.rb b/spec/finders/tags_finder_spec.rb
index 2ac810e478a..98b42e264dc 100644
--- a/spec/finders/tags_finder_spec.rb
+++ b/spec/finders/tags_finder_spec.rb
@@ -20,7 +20,7 @@ describe TagsFinder do
 
         result = tags_finder.execute
         recently_updated_tag = repository.tags.max do |a, b|
-          repository.commit(a.target).committed_date <=> repository.commit(b.target).committed_date
+          repository.commit(a.dereferenced_target).committed_date <=> repository.commit(b.dereferenced_target).committed_date
         end
 
         expect(result.first.name).to eq(recently_updated_tag.name)