BUG: Improper sys.exit() code when cluster-create times out

[dwrightco1]

Express exited with an exit status of zero after running this (but should have exited with a non-zero):

INFO test_ci:test_base.py:317 Creating Cluster: ci-cluster01
INFO test_ci:test_base.py:317 Using nodepool id: 5737508a-71a6-45b2-ab38-6d6610065ded
INFO test_ci:test_base.py:317 Waiting for cluster create to complete, status = True
INFO test_ci:test_base.py:317 Cluster ci-cluster01 created successfully
INFO test_ci:test_base.py:317 Cluster UUID: 2122e8ed-ffc6-4fab-9db8-b604a4491195
INFO test_ci:test_base.py:317 Attaching to cluster ci-cluster01
INFO test_ci:test_base.py:317 Discovering UUIDs for the cluster's master nodes
INFO test_ci:test_base.py:317 Master nodes:
INFO test_ci:test_base.py:317 b8d8cbc6-4d31-4673-bdb7-267aa576d025
INFO test_ci:test_base.py:317 Waiting for cluster create to complete, status = True
INFO test_ci:test_base.py:317 Attaching master nodes to the cluster
INFO test_ci:test_base.py:317 Waiting for cluster to become ready
INFO test_ci:test_base.py:317 Attaching to cluster
INFO test_ci:test_base.py:317 Successfully attached to cluster
INFO test_ci:test_base.py:317 Failed to create cluster ci-cluster01. Timed out waiting for 1 master to become active. Current active count 0.