Add unit tests to the templates

[piojo-zz]

We want to test how these templates render.

For now, we'll do single-line regexp-based tests. We propose to have the following structure for each service:

• $tt_root/$service/
  • TT files come here.
  • pan
    Contains at least schema.pan.
  • test/
    • profiles/
      Contains test profiles for this service. The data we feed to
      the file starts from "/metaconfig" in the profile, for simplicity.
    • regexps/
      Contains the regular expressions the rendered TT file for each
      profile should match. For each profile we'll have either:
      • A single file with the same name of that profile.
      • A directory containing all the regular expression files for
        that profile. The name of the directory must be the same of
        the profile, and the names of the files is free.

Then, each regexp file file will have a description header, a separator and one regexp per line, like this.

description

---
flag1
flag2
(not, case-insensitive, other?...)

---
regexp1
regexp2
...

All sections are mandatory, but can be empty.

We'll package only the .tt files and the json2tt script for
development and debugging purposes.