Use items() in lieu of iteritems()

The iteritems dictionary method has been removed in Python 3 and using
items() is typically no problem in our case due to the fact that
dictionaries are rather small.

This fixes #15

logrotate/jobs.sls

@@ -5,7 +5,7 @@
 include:
   - logrotate
 
-{% for key,value in jobs.iteritems() %}
+{% for key,value in jobs.items() %}
 logrotate_{{key}}:
   file.managed:
     - name: {{ logrotate.include_dir }}/{{ key.split("/")[-1] }}