update to awsbox 0.5.0
suppress errors from post_create when running deploy with missing sauce creds
upgrade to awsbox 0.5.1
awsbox 0.5.1 in package.json
update to nice-route53 0.3.3 in lockdown.json
Merge pull request #3890 from mozilla/awsbox-0.5.x-upgrade

Awsbox 0.5.x upgrade