This commit updates the LifecycleService to make use of the project's build plan when running. This specially affects destructive mode, where: - Trying to run a build plan with no items is a (new) error; - Trying to run a build plan with multiple items is a (new) error; Note that although some forms of the "clean" command are also performed destructively, in this case we don't use the build plan. The rationale for this is: - The lifecycle's local clean is always the same, regardless of target arch; - Trying to define a build plan item via e.g. "appname clean --build-for=x" looks non-sensical (why define a "build-for" if I want to "clean"), and from a user's perspective calling "appname clean --destructive-mode" should just cleanup whatever was built previously. - [ ] Have you followed the guidelines for contributing? - [ ] Have you signed the [CLA](http://www.ubuntu.com/legal/contributors/)? - [ ] Have you successfully run `tox`? -----