Provide ability to install packages or skip logs if not needed

[jdb-at-aws]

What would you like to be added:

Not everyone requires the IP tables logs. The script currently requires iptables to be installed and if it isn't, the script fails. Instead, if /iptables installed/then send logs/else skip logs.

Why is this needed:

Some customers are locked down and cannot install iptables on their hosts and don't need those particular logs to debug all issues.

[mmerkes]

Are you talking about the log collector script? iptables comes standard in AmazonLinux AMIs, so it should be present in the majority of AMIs. That being said, I don't think it's unreasonable to add a branch to the log collector script to check if iptables is there before doing anything that expects it to be.

[ttres]

@jdb-at-aws iptables will be used only if available, and the script will not fail otherwise. See the get_iptables_info function.

Can we set this issue as resolved?