Strings on the template generator are not internationalized

Lack of translation needs to be fixed in different way case by case.

template_generator/index.html should be translated as django template. This may be merged into Queens release.

And some needs to be translated in an angular-gettext way. This may be fixed in later release.

As for translation in canvas, I agree to delete the hard-coding lines. And I suggest the deletion may be merged in Queens release, too.

Additionally, vis.js is used to implement the canvas, and it has its own way to localize (see link below).
http://visjs.org/docs/network/#locales
But only three simple words need translation in canvas, "Edit", "Connect", and "Back". Maybe we don't want to spend much time to solve this part.

Fix proposed to branch: master
Review: https://review.openstack.org/541204

Reviewed: https://review.openstack.org/541126
Committed: https://git.openstack.org/cgit/openstack/heat-dashboard/commit/?id=01828789e23ca75fca0c0a29d811dfbb7e2f35ba
Submitter: Zuul
Branch: master

commit 01828789e23ca75fca0c0a29d811dfbb7e2f35ba
Author: Akihiro Motoki <email address hidden>
Date: Tue Feb 6 13:51:53 2018 +0900

    i18n: Annotate template generator django template properly

    Strings in Django template for the template generator was previously
    annotated using angular-gettext syntax, but this is Djnago temaplate.
    Djnago templates need to be annotated in the Django i18n way [1].

    [1] https://docs.djangoproject.com/en/2.0/topics/i18n/translation/#internationalization-in-template-code

    Change-Id: I094fd3ab1c59bb1f96e713a70054cc5b99898974
    Partial-Bug: #1747302

Reviewed: https://review.openstack.org/541204
Committed: https://git.openstack.org/cgit/openstack/heat-dashboard/commit/?id=62a93c9b8056da5c969347a0ab7bd53755f7dc82
Submitter: Zuul
Branch: master

commit 62a93c9b8056da5c969347a0ab7bd53755f7dc82
Author: Xinni Ge <email address hidden>
Date: Tue Feb 6 16:53:24 2018 +0900

    Delete hard-coding lines of locale

    Hard-coding of canvas translation for ja-JP is not supposed to be
     in javasript files.
    Delete related lines in vis-network controller.

    Change-Id: Ic71d8b04607854d0cb40cd0de6751632f7380639
    Partial-Bug: #1747302

Thank you very much for the quick action to fix this.

Just reporting that I have checked the Template Generator tab on my test environment and found that majority of issues are resolved.
The page title, description, and menu buttons (and their tooltips) are localized now, however the button labels and the message shown on the top left of the canvas, as well as the messages shown on the top right after an action was performed are still unlocalized (see screenshot attached).

My apologies -- I have overlooked the comment #2:
   But only three simple words need translation in canvas, "Edit", "Connect", and "Back". Maybe we
   don't want to spend much time to solve this part.

Thank you once again for your quick action.