Fixes and features to better support multi task cluster and routing

[gwdp]

Sorry for the 'compressed' commit, had to squash some due privacy concerns.

• Fix: Issue with multiple tasks not having ELB ingress group set

• Fix: Issue related to service ingress sec. group not accepting ports when public

• Improvement: Create ELB object, handle listeners for different tasks using the same port w/ priority
• Improvement: Use one exposed port on task to receive multiple protocols
• Improvement: Improve support to non-exposed tasks (remove port bind from container, ...)
• Improvement: Add resource name on ELB, Cluster and others - Prefix resources with service name
• Improvement: sanitize resources names by limiting to 32 chars
• Change: Remove '-' notation

• Feature: Add option to disable ELB on a specific task

• Feature: Add option to specify multiple paths and methods for each task
• Feature: Explicitly ask for ECS managed tasks feature when using it.