Upgrade aws-java-sdk 1.7.5 (latest)
ASGARD-1283 - Add Eureka client to Asgard and make Asgard register with Eureka service

This will enable Asgard to publish its health check URL to Eureka, which will enable us to use Asgard to deploy Asgard safely.

An Asgard instance will change its own Eureka status from STARTING to UP as soon as the instance is healthy (ready for traffic).
Merge pull request #533 from joesondow/ASGARD-1283-eureka-client

ASGARD-1283 Add Eureka client to Asgard and make Asgard register with Eureka service