Top level `series` not respected in bundle with local charms

[Joseph Borg]

Example bundle is attached.

When deploying a bundle with `series` set at the top level, the series is not respected by locally sourced charms. This means that, if you've set multiple series in the charm's `metadata.yaml`, you're likely to get a failure such as

`ERROR cannot deploy bundle: cannot add relation between "flannel:cni" and "kubernetes-master:cni": cannot add relation "flannel:cni kubernetes-master:cni": principal and subordinate applications' series must match`

The only ways I can get around this is by either only setting 1 series in the `metadata.yaml` or by setting the series of local applications (at the application level) explicitly in the bundle yaml.

[Achilleas Anagnostopoulos (achilleasa)]

Is this still an issue? I haven't been able to reproduce it.
Here is what I have tried so far:

pulled kubernetes-master locally and set series to:
```
 - xenial
 - bionic
 - qantal
```

I then tried deploying the following bundle (based off the attached cdk.yaml file):

```
description: A test bundle
series: bionic
services:
  flannel:
    charm: cs:~containers/flannel-351
  kubernetes-master:
    charm: /home/achilleas/charms/kubernetes-master
    num_units: 1
relations:
- - flannel:cni
  - kubernetes-master:cni
```

and I get the following output:

```
Resolving charm: cs:~containers/flannel-351
Executing changes:
- upload charm cs:~containers/flannel-351 for series bionic
- deploy application flannel on bionic using cs:~containers/flannel-351
  added resource flannel-amd64
  added resource flannel-arm64
  added resource flannel-s390x
- upload charm /home/achilleas/charms/kubernetes-master for series bionic
- deploy application kubernetes-master on bionic using /home/achilleas/charms/kubernetes-master
  added resource cdk-addons
  added resource kube-apiserver
  added resource kube-controller-manager
  added resource kube-proxy
  added resource kube-scheduler
  added resource kubectl
- add relation flannel:cni - kubernetes-master:cni
- add unit kubernetes-master/0 to new machine 7
Deploy of bundle completed.
```

[Canonical Juju QA Bot (juju-qa-bot)]

This bug has not been updated in 2 years, so we're marking it Low importance. If you believe this is incorrect, please update the importance.