If a conductor dies while holding a reservation, the node can get
stuck in its current state. Currently the conductor that takes
over the node only cleans it up if it's in the DEPLOYING state.
This change applies the same logic for all nodes:
1. Reservation is cleared by the conductor that took over the node
no matter what provision state.
2. CLEANING is also aborted, nodes are moved to CLEAN FAIL with
maintenance on.
3. Target power state is cleared as well.
The reservation is cleared even for nodes in maintenance mode,
otherwise it's impossible to move them out of maintenance.
Change-Id: I379c1335692046ca9423fda5ea68d2f10c065cb5
Closes-Bug: #1588901
Julia Kreger