Return full GitCommit message as part of FindLocalBranch gRPC response.

Pavlo Strokovrequested to merge
ps-find-local-branches-include-parent-ids into master

GitLab uses FindLocalBranch gRPC call to retrieve information about branches. This change adds commit field into the response. This is required to fix empty "parent_ids" field received from api/v4/projects/1/repository/branches endpoint and omit duplication.

Part of: gitlab#20675 (closed)

Edited by GitLab Release Tools Bot

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