apps.v1.deployment constructor match pods across deployments

[redbaron]

current defaults are pretty dangerous ,as they going to match pods across deployments:

new(name='', replicas=1, containers='', podLabels={ app: 'name' }):: apiVersion + kind + 
...
self.mixin.spec.template.metadata.withLabels(podLabels) + 
...

should be something like:

new(name='', replicas=1, containers='', podLabels=null):: apiVersion + kind + 
...
self.mixin.spec.template.metadata.withLabels(if podLabels != null podLabels else {app: name}) +
...