Add the missing heat.po files into heat

There is only one file "heat.pot" in heat/locale/.
We need to add the missing heat.po files.
I updated "heat.pot" file and added the supported languages
(Take glance po files as reference).
The added files are used for
setting up the structure of directory.
The po file doesn't have any translated strings.

Fixes bug #1217172

Change-Id: I1e017c332c80eb01b04e042b5da0129198169bd5
Merge "Add the missing heat.po files into heat"