ci(kitchen): use `cron-formula` dependency instead of `cron` state

* Semi-automated using https://github.com/myii/ssf-formula/pull/401

kitchen.yml

   - name: default
     provisioner:
       dependencies:
-        - name: states
-          path: ./test/salt
+        - name: cron
+          repo: git
+          source: https://github.com/saltstack-formulas/cron-formula.git
       state_top:
         base:
-          'G@os_family:Suse or G@os_family:Debian':
-            - states.cron
           '*':
             - logrotate._mapdata
+            - cron
             - logrotate
       pillars:
         top.sls:

logrotate/config.sls

   - logrotate
 
 {% set ns = namespace(hourly=False) %}
-{% set jobs = salt['config.get']('logrotate:jobs', {}) %}
 {% for key, value in logrotate.jobs.items() %}
 {% set contents = value.get('contents', False) %}
   {% if 'hourly' in (contents or value.config) %}

test/salt/states/cron.sls

-
-cron_package:
-  pkg.installed:
-    - name: cron