Source defaults file if found
Add `/etc/default/elasticsearch` resource (referenced in #102)
Use ulimit for all flavors

- clean old limits
- use ulimit for all flavors
Add `fi` that was mistakenly dropped during edit
Make modification to the `/etc/security/limits.conf` file opt-in
Scrub the `limits.conf` file by default and allow for opt-out
Update code block formatting from merge
Fix typo in aws attributes
formatting
Fix the stop function in init script to make sure the process gets killed
Merge remote-tracking branch 'hw-cookbooks-es-cookbook/feature/source-defaults'