Add optional host_header for lb listener rule

* make path_pattern optional

1.3.10

work around empty tuple

1.3.9

Enable utilization alarms for EC2 only

1.1.0.1

Have optional splunk with capped cpu

1.1.1

set splunk-verify-connection to false, so container will start up regardless of logdriver url is reachable.

1.3.8

Support for placement constraints.

1.3.7

Allow terraform to choose priority when omitted.

1.3.6

• change default placement strategy to spread

1.3.5

Set iam_role to be Optional

Add tagging to ECS services

Merge pull request #10 from bnc-projects/fix-tagging

Add tagging to ecs service