The dynamically allocated console port for a node is saved
into database and reused on subsequent console operations.
In certain code path the port record cann't be trusted and
we should do a re-allocation.
This patch fixes the issue by ignores previous allocation
record. The extra cleanup in the takeover is not required
anymore and removed as well.
Change-Id: I1a07ea9b30a2c760af7a6a4e39f3ff227df28fff
Story: 2010489
Task: 47061
c9c9b3100d