Modify KubeVirtMachine API to include entire VM Template section

[davidvossel]

fixes #11
fixes #41
fixes #51

This modifies the KubeVirtMachine api to include the entire VM template section rather than just a VMI spec. This allows the following scenarios to be expressed which were not possible before.

• KubeVirtMachines can now use DataVolumeTemplates for disk import and persistent storage
• KubeVirtMachines now has the potential to specify the KubeVirt VM's namespace independently of the KubeVirtMachine's namespace, this is useful for external clusters
• Custom annotations and labels can now get set on the KubeVirt VM/VMI independently of the KubeVirtMachine.

KubevirtMachineTemplate
├── ...
└── spec
    └── template
        ├── metadata (metadata used for KubevirtMachine)
            ├── providerID
            └── virtualMachineTemplate
                ├── metadata (metadata used when creating the KubeVirt VM)
                └── spec  (= VirtualMachine.spec)
                    ├── dataVolumeTemplates
                    └── template
                        ├── metadata (metadata assigned to the running VMI instance)
                        └── spec  (= VirtualMachineInstance.spec)

Modifies KubeVirtMachine api to include entire VM Template section

[davidvossel]

/cc @agradouski fyi, this handles the external namespace. The previous behavior you implemented still remains. The custom namespace is only used when the kubevirtMachine.Spec.VirtualMachineTemplate.Namespace is set to something other than "".

[agradouski]

thanks for your PR @davidvossel! changes look great, tested locally.
/approve
/lgtm

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: agradouski, davidvossel

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Details

Needs approval from an approver in each of these files:

• OWNERS [agradouski]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment