Need to check and fix i18N compliance(add _())

[Chen Xiao]

In heat, almost 200 message and at least 30 exception message are not processed by _(),
and can not been translated.
We should use '_("STRING ...")' to enable i18n support

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/56342

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/56342
Committed: http://github.com/openstack/heat/commit/c7c4901c80e8ff62245340e0479cb33fa4eccc9f
Submitter: Jenkins
Branch: master

commit c7c4901c80e8ff62245340e0479cb33fa4eccc9f
Author: chenxiao <email address hidden>
Date: Thu Nov 14 16:57:01 2013 +0800

    Add _() to fix i18N compliance (part 1)

    In heat, almost 200 log message and at least 30 exception
    message are not processed by _(), and will not been translated.
    We should use '_("STRING ...")' to enable i18n support.

    I will split to two parts for review easier because the files
    lost of _() are too much.

    Closes-Bug: #1249217

    Change-Id: I2c86dc7770a7f6f107ba16711b9cba363ef9b906

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/56566

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/56566
Committed: http://github.com/openstack/heat/commit/bd72bf369c9fad84c538f37373a745702e683899
Submitter: Jenkins
Branch: master

commit bd72bf369c9fad84c538f37373a745702e683899
Author: chenxiao <email address hidden>
Date: Fri Nov 15 17:45:21 2013 +0800

    Add _() to fix i18N compliance (part 2)

    In heat, almost 200 log message and at least 30 exception
    message are not processed by _(), and will not been translated.
    We should use '_("STRING ...")' to enable i18n support.

    I split to two parts for review easier because the files
    lost of _() are too much.

    Change-Id: I36ccd119fc1dcb58e98b77b2c9d139af6a380a7a
    Closes-Bug: #1249217