CI script raise a KeyError exception after add one cloud

804BE800-9491-11E2-8567-000000821800:/home/fsp/cherry_for_111T_v0.1/patches_tool # python config.py prepare
Start to config cascading....
Traceback (most recent call last):
  File "config.py", line 604, in <module>
    dispatch_patch_tool = DispatchPatchTool(proxy_match_region=CONF.DEFAULT.proxy_match_region)
  File "/home/fsp/cherry_for_111T_v0.1/patches_tool/dispatch.py", line 23, in __init__
    self.proxy_hosts = self.cps_service_business.get_all_proxy_nodes(self.proxy_match_region)
  File "/home/fsp/cherry_for_111T_v0.1/patches_tool/services.py", line 584, in get_all_proxy_nodes
    region = self._get_region_by_roles_list(roles_list, proxy_match_region)
  File "/home/fsp/cherry_for_111T_v0.1/patches_tool/services.py", line 619, in _get_region_by_roles_list
    return proxy_match_region[proxy_number]
KeyError: u'proxy005'

above error caused by follow error configuration, our script should support it, if there is no config to proxy005, it can work properly.

804BE800-9491-11E2-8567-000000821800:/home/fsp/cherry_for_111T_v0.1/patches_tool # cat patches_tool_config.ini
[DEFAULT]
# <PROXY_NUMBER>:<HOST_NAME>
# PROXY_NUMBER is the number of proxy, HOST_NAME is the host in which you want to deploy porxy in.
# By using commands "cps host-list", it will show all host, and you can select one host of compute to match proxy number.
proxy_match_host=proxy001:804BE800-9491-11E2-8567-000000821800,proxy002:420888F6-B670-554B-48F9-53F9622B30DD,proxy003:4208FC10-02BB-DFC6-0485-0B67CB072FD5

# <PROXY_NUMBER>:<REGION>
# PROXY_NUMBER is the number of proxy
# REGION is the region which the proxy will connect with
proxy_match_region=proxy001:az01.shenzhen--fusionsphere.huawei.com, proxy002:az11.shenzhen--vcloud.huawei.com,proxy003:az31.singapore--aws.huawei.com

# cascaded_add_route is use to define route table in cascaded node.
......