deployer: add aws properties to B::D::Specification for aws_registry

Change-Id: I62486b4911ed3f8fbef7cacfe406a7c5fe3213d6
Up default timeout to 10 minutes from 5 minutes, aws is slower than vsphere

also remove unneeded unless

Change-Id: Iff3fc83cdef2bab24fd11396434b42446c2817cb