Add more verbose curl output and pauses.

Test 4 is failing consistently on the CI server with
no obvious reason, so trying to eliminate possibility
of a race condition.
XD-1491, XD-1492 Support Container Attributes

Added --groups command line arg

Renamed ContainerMetadata to ContainerAttributes
XD-1506 Adding admin-ui to YARN zip packaging
Fix footer content on the UI

- Update license to read "Code licensed under Apache Open Source"
Fixed AbstractSingleNodeStreamDeploymentIntegrationTests