Remove short since it's duplicate... (#53)

* Remove short since it's duplicate...

* Update Changelog

Author: ROunofF

CHANGELOG.md

@@ -4,6 +4,8 @@ This project adheres to [Semantic Versioning](http://semver.org/).
 This CHANGELOG follows the format listed at [Keep A Changelog](http://keepachangelog.com/)
 
 ## [Unreleased]
+### Fixed
+- Remove short options -s on hostname_sub, it was unusable. This affects check-graphite-data and check check-graphite-hosts
 
 ## [2.1.0] - 2017-06-11
 ### Changed

lib/sensu-plugins-graphite/graphite_proxy/options.rb

@@ -76,7 +76,6 @@ def self.default_options
 
           hostname_sub: {
             description: 'Character used to replace periods (.) in hostname (default: _)',
-            short: '-s CHARACTER',
             long: '--host-sub CHARACTER'
           },