This sets multiple threads in Deckhand's chart config (4)
and set workers to just 1.
Deckhand's database is not configured to work with multiprocessing.
Currently there is a data race on acquiring shared SQLAlchemy
engine pooled connection strings when workers > 1. As a
workaround, we use multiple threads but only 1 worker. For more
information, see:
https://github.com/att-comdev/deckhand/issues/20
Change-Id: I60adeffff5461fdda957124232bc5a606baae413
5c9efa9d74