`juju status` message field could be more friendly when container is being created

[Jonatas Baldin]

Right after the deployment of a Charm, while the container is being created, juju status shows a not very friendly message:

$ juju deploy cs:~postgresql-charmers/postgresql-k8s postgresql
Located charm "postgresql-k8s" in charm-store, revision 7
Deploying "postgresql" from charm-store charm "postgresql-k8s", revision 7 in channel stable

$ juju status
Model Controller Cloud/Region Version SLA Timestamp
my-model my-k8s my-k8s 2.9-rc6 unsupported 17:29:01+01:00

App Version Status Scale Charm Store Rev OS Address Message
postgresql error 0/1 postgresql-k8s charmstore 7 kubernetes unknown container reason "ContainerCreating":

Unit Workload Agent Address Ports Message
postgresql/0 waiting allocating installing agent

Juju could be more friendly and report a Waiting status with Container is being created message instead of Error and unknown container reason.