[baremetal] MaaS: Reduce timeout values

[baremetal] MaaS: Reduce timeout values

`maas_fixup` is already re-entrant, so we can execute it more than
once during a commissioning/deploy cycle. Reduce the timeout waiting
for all nodes to reach a stable state, so nodes stuck in 'Ready'
state instead of reaching 'Deploying' get dealt with sooner (~5 min
vs old 30 min).

While at it, let `maas_fixup` handle machine deploy as well, so we
can catch nodes stuck in 'Ready' state and re-trigger the deploy.

Change-Id: Id24cc97b17489835c5846288639a9a6032bd320a
Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>