[nova] Use default cpu limit for rabbitmq
[nova] Use default cpu limit for rabbitmq

We used to set a higher cpu limit on the nova-rabbitmq than the default,
but now the default is even higher than our value of 2 (it's 5) and thus
we remove override as the higher value seems necessary during startup.

sapcc/helm-charts,sapcc/helm-charts,sapcc/helm-charts,sapcc/helm-charts