key_id is overloaded, use key_str

bin/gitlab-shell

@@ -5,7 +5,7 @@ unless ENV['SSH_CONNECTION']
   exit
 end
 
-key_id = /key-[0-9]+/.match(ARGV.join).to_s
+key_str = /key-[0-9]+/.match(ARGV.join).to_s
 original_cmd = ENV.delete('SSH_ORIGINAL_COMMAND')
 
 require_relative '../lib/gitlab_init'
@@ -17,7 +17,7 @@ require_relative '../lib/gitlab_init'
 #
 require File.join(ROOT_PATH, 'lib', 'gitlab_shell')
 
-if GitlabShell.new(key_id).exec(original_cmd)
+if GitlabShell.new(key_str).exec(original_cmd)
   exit 0
 else
   exit 1