Fix access to value of var in gNMI Update

Description

Related Issue

Motivation and Context

How Has This Been Tested?

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.

requested review from @hda11597

assigned to @hda11249

approved this merge request

added 3 commits

• 14d93d6a...1bd69576 - 2 commits from branch master
• 5f98b0ad - fix access to value of var

Compare with previous version

merged

mentioned in commit b63b0c54