Revert "Revert "Run all dsvm jobs from juno onwards on trusty""

This reverts commit 72c32e161e126a7dfdda82f801ba4c18b2f76a9e.

Jenkins masters have all had their gearman plugin updating which makes
them register jobs properly.

Change-Id: I6894e590a2ee033ad46149c2859b8f8c33055c5a
Merge "Revert "Revert "Run all dsvm jobs from juno onwards on trusty"""