add fix-committer git pre-push hook
add fix-committer git pre-push hook

Signed-off-by: Stu Pollock <f92a33a5576f99e8c458f20aa3ed76c650ba4a5c@pivotal.io>

guidowb/cli-plugin-repo,kkellner/cli-plugin-repo,cloudfoundry-incubator/cli-plugin-repo,cloudfoundry-incubator/cli-plugin-repo,guidowb/cli-plugin-repo,cloudfoundry-incubator/cli-plugin-repo,kkellner/cli-plugin-repo,cloudfoundry-incubator/cli-plugin-repo,kkellner/cli-plugin-repo,guidowb/cli-plugin-repo,guidowb/cli-plugin-repo