This patch fixes issues with building ironic bootstrap:
* fix if condition that is a trigger to build ironic bootstrap
* build fuel image always, ironic bootstrap only when ironic is enabled
* Drop incorrect condition check for fuel image
Change-Id: Ib7ee0c656ffa71ce913e1924bb80260744319a3a
Closes-Bug: #1653204
Provision and deletion tasks shouldn't be hardcoded into nailgun and
astute. This patch creates representation for these tasks in library
side as a separate graphs which can be executed in consecutive manner.
blueprint: graph-concept-extension
Change-Id: Icb55739ad1dbffa3c32341b1caea9046d7917240