Fix govuk_env_sync.sh error handling
Fix govuk_env_sync.sh error handling

- Evaluation of array in conditional is not a good bash move

- Added hash to ease addition of ignored warnings

solo: da39a3ee5e6b4b0d3255bfef95601890afd80709@schmie

alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet