utilities: Fix the bug that using help in ovn-ctl #167
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When using `ovn-ctl -h or --help` command, the information that missing command name (use --help for help) will be presented in the last line. Refer from ovs-ctl, run exit instruction after diplay usage information. Signed-off-by: Jun Gu <jun.gu@easystack.cn>
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When using
ovn-ctl -h or --helpcommand, the information thatmissing command name (use --help for help)will be presented in the last line. Refer from ovs-ctl, run exit instruction after diplay usage information.Signed-off-by: Jun Gu jun.gu@easystack.cn