add comments to variables

Author: Sebastian Gumprich

defaults/main.yml

@@ -8,8 +8,8 @@ os_auth_lockout_time: 600 # 10min
 os_auth_timeout: 60
 os_auth_allow_homeless: false
 os_auth_pam_passwdqc_enable: true
-os_auth_pam_passwdqc_options: 'min=disabled,disabled,16,12,8'
-os_auth_pam_pwquality_options: 'try_first_pass retry=3 type='
+os_auth_pam_passwdqc_options: 'min=disabled,disabled,16,12,8' # used in RHEL6
+os_auth_pam_pwquality_options: 'try_first_pass retry=3 type=' # used in RHEL7
 os_auth_root_ttys: [console, tty1, tty2, tty3, tty4, tty5, tty6]
 os_auth_uid_min: 1000
 os_auth_gid_min: 1000