Revert "Import nodepool.builder late for statsd"
Revert "Import nodepool.builder late for statsd"

This reverts commit cdaba901d9385c453faa387f10ceb87cca1dae61.

With change I6d339a8c631f8508a60e9ef890173780157adefd we can
pre-import the builders because it is not relying on any global statsd
objects.  This should also fix logging, as we suspect importing the
module after setup_logging() has broken routing of logs.

Change-Id: Ia1b5bc2329b17b4059d2b6db486185340099bf09

seandst/nodepool,Tesora/tesora-nodepool,seandst/nodepool,Tesora/tesora-nodepool