fix the orphaned channel due to the GrpcChannelFacadeTest

[cicoyle]

Description

I've noticed several orphaned channels showing up locally and in CI. These orphaned channels muddy the error output when trying to debug other issues. I think this resolves one due to the GrpcChannelFacadeTest.

See 'passing' CI log here where there is an orphaned channel

I no longer see the orphaned channel due to this test file locally with this fix.

Issue reference

We strive to have all PR being opened based on an issue, where the problem or feature have been discussed prior to implementation.

Please reference the issue this PR will close: #[issue number]

Checklist

Please make sure you've completed the relevant tasks for this PR, out of the following list:

• Code compiles correctly
• Created/updated tests
• Extended the documentation

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (baef245) 77.56% compared to head (aa36e82) 77.56%.

Additional details and impacted files

@@            Coverage Diff            @@
##             master    #1000   +/-   ##
=========================================
  Coverage     77.56%   77.56%           
  Complexity     1568     1568           
=========================================
  Files           144      144           
  Lines          4757     4757           
  Branches        554      554           
=========================================
  Hits           3690     3690           
  Misses          781      781           
  Partials        286      286           

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