Task to set umask

Add preliminary task to get list of installed shells.
Add tasks to set umask to 077 for all shells, including fish.
Disable qpidd if it is installed
Set default umask for init.d functions
Stop and disable atd
Combine multiple service disabling tasks into one

Add variable that contains array of services and their state for CAT III findings.
Add variable and description to README.
Stop and disable oddjodb
Set umask in /etc/login.defs to 077
Stop and disable ntpdate
Set SELinux policy and set mode to enforcing
Change 'cat2' tag to 'cat3'
Don't display output if no updates are available
Improve snmpd.conf lineinfile

Correct logic of when statement so the task does not fail if net-snmp is not installed.
Improve regexp so it does not continue to add '#' at the beginning of matched lines.