Performace improvments

[jgrammen-agilitypr]

attempt to improve the script performance as mentioned in #20

Someone should review, to ensure these changes are functional and robust.
I could not test on previous versions of puppet.

Pre change:

OK: Puppet agent 4.10.8 running catalogversion 1506738186, and executed at Fri 29 Sep 2017 10:23:11 PM EDT for last time.

real    0m4.712s
user    0m4.496s
sys     0m0.180s

Post change:

OK: Puppet agent 4.10.8 running catalogversion 1506738186, and executed at Fri 29 Sep 2017 10:23:11 PM EDT for last time.

real    0m1.635s
user    0m1.500s
sys     0m0.108s

[aswen]

Nice! Thanks