Add IxiaTG controller deployment

[alexmasi]

• Adds ability to deploy the IxiaTG controller during kne_cli deploy cmd

Add the controllers field to the deployment yaml, optionally specify a custom configmap

e.g.

controllers:
  - kind: IxiaTG
    spec:
      manifests: ../../../keysight/athena/operator

controllers:
  - kind: IxiaTG
    spec:
      manifests: ../../../keysight/athena/operator
      configMap:
        release: 0.0.1-9999
        images:
          - name: controller
            path: some/path
            tag: latest
          - name: ...
          ...`

[coveralls]

Pull Request Test Coverage Report for Build 2150673899

• 71 of 110 (64.55%) changed or added relevant lines in 2 files are covered.
• 2 unchanged lines in 1 file lost coverage.
• Overall coverage increased (+0.2%) to 57.8%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
cmd/deploy/deploy.go	12	14	85.71%
deploy/deploy.go	59	96	61.46%

Files with Coverage Reduction	New Missed Lines	%
deploy/deploy.go	2	64.41%

Totals
Change from base Build 2110560418:	0.2%
Covered Lines:	1871
Relevant Lines:	3237

---

💛 - Coveralls