chore: add support for K8s 1.16.10 & 1.17.6 on Azure Stack

[jadarsie]

Reason for Change:
Pre-pull Azure Stack's custom images for K8s 1.16.10 & 1.17.6

Requirements:

• uses conventional commit messages
• includes documentation
• adds unit tests
• tested upgrade from previous version

Notes:

[codecov]

Codecov Report

Merging #3377 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #3377   +/-   ##
=======================================
  Coverage   72.57%   72.57%           
=======================================
  Files         147      147           
  Lines       25215    25215           
=======================================
  Hits        18300    18300           
  Misses       5782     5782           
  Partials     1133     1133           

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[jackfrancis]

/lgtm

[acs-bot]

[APPROVALNOTIFIER] This PR is APPROVED

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