stack icons
build server URL should be in the ConfigService
also fixed consistent case of 'URL'
only tests that need Mocks should use it
Other tests are then able to run quickly without unnecessary overhead.
Cache instance health checks for significant Stacks
Add view for Stack list and detail
get instance health checks in parallel
changes based on Frigga update
added newline to end of file
code review feedback
Merge pull request #214 from claymccoy/stackSummary

ASGARD-1012 - Create a Stack summary page