Define GIT_TEMPLATE_DIR environment variable in seed helper
Define GIT_TEMPLATE_DIR environment variable in seed helper

See https://github.com/gitlabhq/gitlabhq/pull/9044

Datacom/gitlab_git,argustelecom/gitlab_git,flycutter/gitlab_git,gitlabhq/gitlab_git,argustelecom/gitlab_git,sonalkr132/gitlab_git,flycutter/gitlab_git,ontohub/gitlab_git,gitlabhq/gitlab_git,jvanbaarsen/gitlab_git,sadgb/gitlab_git,ontohub/gitlab_git,oliverguenther/gitlab_git,yukron/gitlab_git