Add support for resource cpu limit to generate kube

[andylibrian]

Fixes #7855

Steps to run:

podman container create --name test-cpu --cpus=0.5 alpine
podman generate kube test-cpu

Output:

apiVersion: v1
kind: Pod
metadata:
  creationTimestamp: "2020-10-08T22:55:42Z"
  labels:
    app: test-cpu
  name: test-cpu
spec:
  containers:
  - command:
    - /bin/sh
    env:
    - name: PATH
      value: /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
    - name: TERM
      value: xterm
    - name: container
      value: podman
    - name: HOSTNAME
    image: docker.io/library/alpine:latest
    name: test-cpu
    resources:
      limits:
        cpu: 500m           <<-- This PR adds cpu limit
    securityContext:
      allowPrivilegeEscalation: true
      capabilities: {}
      privileged: false
      readOnlyRootFilesystem: false
      seLinuxOptions: {}
    workingDir: /
status: {}

[jwhonce]

restarted failed tests

[jwhonce]

/approve

[rhatdan]

Thanks @andylibrian
/approve
lgtm
@containers/podman-maintainers PTAL

[saschagrunert]

LGTM

[openshift-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: andylibrian, jwhonce, rhatdan, saschagrunert

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[vrothberg]

LGTM, thanks!

[vrothberg]

/lgtm