diskimage-builder

Initial element tests Adding a test function which allows us to use elements to perform element-specific tests. In order for this to work sanely, also adding some configuration to our break system so we can assert on negative tests. Also adding a test for apt-sources to verify this code actually works. Change-Id: I378a74255010eca192f5766b653f8a42404be5ea 2015-04-17 02:36:46 +00:00			`base`
			`ubuntu`