Fix missing additional files in PR #96 for Photon image

[kiazhi]

PR Summary

Found out that PR #96 merged without some of the additional files and config in yml.

• Add Photon Tags JSON
• Add Photon Meta JSON
• Add Photon getLatestTag PowerShell script
• Update Photon to vsts-ci.yml
• Update powershell community README

PR Checklist

• PR has a meaningful title
  • Use the present tense and imperative mood when describing your changes
• Summarized changes
• Change is not breaking
• Make sure all Dockerfile, .sh, .ps1 and .psm1 files have the correct copyright header
• This PR is ready to merge and is not Work in Progress.
  • If the PR is work in progress, please add the prefix WIP: to the beginning of the title and remove the prefix when the PR is ready.
• Adds a new image or tag
  • Not Applicable
• OR
  • Update README.powershell.md
  • Update README.powershellcommunity.md
  • Update vsts-ci.yml

[kiazhi]

CentOS7 Stable failed. Probably need to re-trigger the job again

[TravisEz13]

Could you fix the Display names in the YAML file? Line 40 should be stable instead of servicing. Line 45 should be preview instead of servicing. It's just an annoyance but...

PowerShell-Docker/.vsts-ci/phase.yml

Lines 40 to 50 in 7f6699f

	displayName: $(ImageName) Servicing
	condition: succeededOrFailed()
	- ${{ if eq(parameters.communityPreview, 'true') }}:
	- powershell: ./build.ps1 -build -name '$(ImageName)' -CI -Channel 'community-preview' -TestLogPostfix '$(ImageName)-servicing'
	displayName: $(ImageName) Servicing
	condition: succeededOrFailed()
	- ${{ if eq(parameters.communityServicing, 'true') }}:
	- powershell: ./build.ps1 -build -name '$(ImageName)' -CI -Channel 'community-servicing' -TestLogPostfix '$(ImageName)-servicing'
	displayName: $(ImageName) Servicing

[TravisEz13]

Your CI failed due to a random failure in the centos image.