CYB-333, deploy script now has: bundle || { ... exit 1 }

https://jira.ets.berkeley.edu/jira/browse/CYB-333

Deploy will fail when bundle fails. (I applied this safeguard to most other ops but not bundle. Not sure why...)
@johncrossman might also be good to add a `--retry` option here. e.g. ` --retry=5`
https://github.com/ets-berkeley-edu/calcentral/blob/de67dd6078840093b7a0968af25d6e357b101a4d/.travis.yml#L2