Merge branch 'instrument-gitlab-git-repository' into 'master'

Instrument Gitlab::Git::Repository



See merge request !2528

config/initializers/metrics.rb

@@ -49,6 +49,7 @@ if Gitlab::Metrics.enabled?
     config.instrument_instance_methods(Gitlab::Shell)
     config.instrument_methods(Gitlab::Git)
+    config.instrument_instance_methods(Gitlab::Git::Repository)
     Gitlab::Git.constants.each do |name|
       const = Gitlab::Git.const_get(name)