Description of problem:
When specify "LANG" opention and it's not "eng", rhsm will throw a error message then quit.

Version-Release number of selected component (if applicable):
subscription-manager-firstboot-1.10.10-1.el7.x86_64
subscription-manager-1.10.10-1.el7.x86_64
subscription-manager-gui-1.10.10-1.el7.x86_64
python-rhsm-1.10.10-1.el7.x86_64

How reproducible:
always

How reproducible:
always

Steps to Reproduce:
1.run cmd with "LANG=***"

Actual results:
[root@dhcp-13-59 ~]# LANG=zh subscription-manager register
'ascii' codec can't encode characters in position 0-2: ordinal not in range(128)
[root@dhcp-13-59 ~]# LANG=fr subscription-manager list --available
'ascii' codec can't encode character u'\xe8' in position 7: ordinal not in range(128)
[root@dhcp-13-59 ~]# LANG=ml subscription-manager facts
'ascii' codec can't encode characters in position 0-7: ordinal not in range(128)
[root@dhcp-13-59 ~]# LANG=ja subscription-manager repos
'ascii' codec can't encode characters in position 0-1: ordinal not in range(128)


[root@dhcp-13-59 ~]# LANG=eng subscription-manager status  <----LANG=eng rhsm works fine.
+-------------------------------------------+
   System Status Details
+-------------------------------------------+
Overall Status: Current


Expected results:
No error will show and the rhsm should work fine when use LANG=***.

Additional info:
The help doc works fine with "LANG=***" option like：
[root@dhcp-13-59 ~]# LANG=zh subscription-manager status
'ascii' codec can't encode characters in position 0-2: ordinal not in range(128)
[root@dhcp-13-59 ~]# LANG=zh subscription-manager status --help 
使用：subscription-manager status [选项]

显示这个系统订阅和产品的状态信息

选项:
  -h, --help            显示此帮助信息并退出
  --proxy=PROXY_URL     proxy URL 的格式为 proxy_hostname:proxy_port
  --proxyuser=PROXY_USER
                        使用基本验证的 HTTP proxy 用户
  --proxypassword=PROXY_PASSWORD
                        使用基本验证的 HTTP proxy 密码
  --ondate=ON_DATE      以后要查看状态的日期，默认为今天的日期（例如：2014-01-14）