This builds on the deployment steps framework spec
(I2f68170e6741b0dbb6d5fbd5315a3be9fd7b28a7) such that it is possible to
request a particular set of deployment steps by requesting a set of
traits.
Change-Id: I7a56db52873655b15efe83282df8f864d932ca79
Story: 1722275
Task: 10626