Don't use singleton list in jjb
Singleton lists cause funny issues in JJB so remove this new one that
snuck in with the ubuntu-trusty cleanup. Just switch it to a bare value.
- translation-jobs-newton
- translation-jobs-ocata
- gate-rally-dsvm-neutron-{name}-{node}{suffix}:
- node:
- - ubuntu-xenial
+ node: ubuntu-xenial
suffix: ''
telemetry: '0'
- gate-rally-dsvm-py35-neutron-{name}-{node}{suffix}:
