The original version of ember-block-slots doesn't support ember 3 and it
seems like development has stalled on the original version.
This adds a modified version as an in-repo-addon that is compatible with
ember 3.
Adds additional 'enterprise' text underneath the 'startup' logo if the
ui is built with a CONSUL_BINARY_TYPE environment variable that doesn't
equal `oss`.
1. Also add index.html things to test/index.html
2. Use content-for to hedge against keeping content in sync (requires an
addon)
3. Test passes but only when run on its own, as we need to rely on
content in the QUnit runner, theoretically it is not running our test in
isolation. Skipping the test for the moment so we don't have a filaing
test when all run together
