Added unit test

Test ability to extract context with composite keys
temporarily disable TestRestartContainer - any container tests following it times out on NewContainer()
Merge pull request #987 from control-center/feature/hack-disable-TestRestartContainer

temporarily disable TestRestartContainer - any container tests following...
Merge pull request #985 from control-center/feature/ZEN-13886

Added unit test
changed Service.Context to natural representation (map[string]interface{}) from current json encoded string