Toggle detailed monitoring in launch configuration

[henderjm]

I have been using the Nomad Cluster module and I noticed a larger increase in $cost to the additional Nomad Clusters we have recently added and was curious what caused this. CloudWatch was an outlier of the increase and noticed by default, detailed monitoring is enabled through Terraforms aws_launch_configuration resource.

There currently doesn't exist a variable to toggle this off, which would be of benefit to my non production clusters because I'm not really concerned about scaling abilities and moreso about the running cost :)

Happy to PR.

[brikis98]

Ah, good point. Making this configurable is probably a good idea. PR welcome!