* To be reused for upcoming `rubocop` settings as well

* saltstack-formulas/template-formula#175 (comment)

* Main goal:   one lint job
* Alternative: split `rubocop` into a separate lint job (`allow_failures`)
* Long-term:   to be able to fully revert this commit when a single lint
               job can be use for all formulas

* `ufw` is still stuck on `trusty` on Travis
  - This doesn't work with when `salt` is installed during the
    `salt-lint` installation process (issue with `tornado`)
  - Installing via. Python 3 works, albeit much slower

* Automated using #60

```bash
Examining ssf/libcimatrix.jinja of type state
[204] Lines should be no longer that 160 chars
ssf/libcimatrix.jinja:4
{%- macro format_ci_matrix(platforms, inspec_suites_kitchen, inspec_suites_matrix, platforms_matrix, platforms_matrix_commented_includes, semrel_formula, width=4, use_new_travis_format=False ) %}

[203] Most files should not contain tabs
ssf/libcimatrix.jinja:28
{#-             | #     | inc   | exc   | result |                                                          #}

[203] Most files should not contain tabs
ssf/libcimatrix.jinja:30
{#-             | 1     |  y    | []    |  TRUE  |                                                          #}

[203] Most files should not contain tabs
ssf/libcimatrix.jinja:31
{#-             | 2     |  y    |  n    |  TRUE  |                                                          #}

[203] Most files should not contain tabs
ssf/libcimatrix.jinja:32
{#-             | 3     |  y    |  y    |  TRUE  |                                                          #}

[203] Most files should not contain tabs
ssf/libcimatrix.jinja:33
{#-             | 4     | []    | []    |  TRUE  |                                                          #}

[203] Most files should not contain tabs
ssf/libcimatrix.jinja:34
{#-             | 5     | []    |  n    |  TRUE  |                                                          #}

[203] Most files should not contain tabs
ssf/libcimatrix.jinja:35
{#-             | 6     | []    |  y    | FALSE  |                                                          #}

[203] Most files should not contain tabs
ssf/libcimatrix.jinja:36
{#-             | 7     |  n    | []    | FALSE  |                                                          #}

[203] Most files should not contain tabs
ssf/libcimatrix.jinja:37
{#-             | 8     |  n    |  n    | FALSE  |                                                          #}

[203] Most files should not contain tabs
ssf/libcimatrix.jinja:38
{#-             | 9     |  n    |  y    | FALSE  |                                                          #}

[206] Jinja variables should have spaces before and after: {{ var_name }}
ssf/libcimatrix.jinja:70
{{ comment }}- {{instance_and_env }}{{ instance }}

...

Examining ssf/map.jinja of type state
[209] Jinja comment should have spaces before and after: {# comment #}
ssf/map.jinja:10
{## Merge the formulas ##}
```