Append UMBEParams to unicorn contentUri, not the media gen.
Append extra params specified here XAO-412.
Still need to write tests, and add a few more params.
Tests for umbe params.
Added more tests
Update History.md. Release 0.7.0
Merge branch 'release/0.7.0'
Merge tag '0.7.0' into develop

0.7.0
Append UMBEParams to mediaGen instead of vmap uri.