Merge branch 'fix_backup_spec' into 'master'

Fix Backup Spec

spec/tasks/gitlab/backup_rake_spec.rb

@@ -32,10 +32,10 @@ describe 'gitlab:app namespace rake task' do
         Rake::Task["gitlab:shell:setup"].stub invoke: true
       end
-      let(:gitlab_version) { %x{git rev-parse HEAD}.gsub(/\n/,"") }
+      let(:gitlab_version) { Gitlab::VERSION }
       it 'should fail on mismatch' do
-        YAML.stub load_file: {gitlab_version: gitlab_version.reverse}
+        YAML.stub load_file: {gitlab_version: "not #{gitlab_version}" }
         expect { run_rake_task }.to raise_error SystemExit
       end