server_type use _() gettext may lead post metadata failed

[Alex Yang]

In the proxy-server, the account, container and object controller use the gettext function to wrap the server_type.
The transfer_headers() will filter the headers which is not start with 'x-{server_type}-meta-'.
It works well in the system of English language. If the system language is Chinese or Japanese, the headers which starts with 'X-Container-Meta-' and 'X-Account-Meta-' will be filtered because the gettext function will translate the server_type into Chinese or Japanese.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/12033

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/12033
Committed: http://github.com/openstack/swift/commit/2a38a040924b621bce4e999b3c7dab692f497a21
Submitter: Jenkins
Branch: master

commit 2a38a040924b621bce4e999b3c7dab692f497a21
Author: Alex Yang <email address hidden>
Date: Tue Aug 28 10:51:49 2012 +0800

    Remove the gettext wrapper of server_type.

    The gettext wrapper of server_type in controllers is used to translate
    server_type in log. But the transfer_headers function which used to
    filter the illegal metadata headers use the wrapped server_type. So, it
    will cause problems that 'X-Account-Meta-' and 'X-Container-Meta-' would
    be filtered when the language of operating system is not english, such
    as Chinese or Japnese. So, I removed the wrapper.

    Change-Id: I7d47e67b4caf5d0be171a90740f9bb12fa2cba84
    Fixes: Bug #1042142