Missing CIS checks

[mew1033]

centos-6-level-1-scored-v2-0-1.yaml is missing a few checks:

• 5.2.12
• 5.2.14
• 5.2.15

Possibly more, but that's what I've found.

[mew1033]

PR #284 adds in 5.2.12 and 5.2.14

[basepi]

Perfect. I modified the original issue with a checklist.

[basepi]

This issue was moved to hubblestack/hubble-salt#46