fix: fix loadbalancer metadata type.

[fuyuwei01]

PR Type

Describe what this PR does for and how you did.

Adding the issue link (#xxx) if possible.

Note

Checklist

• Add information of this PR to CHANGELOG.md in root of project.
• Add documentation in javadoc or comment below the PR if necessary.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 67.13%. Comparing base (0ff2e44) to head (828b2a0).
Report is 1 commits behind head on 2021.

Additional details and impacted files

@@            Coverage Diff            @@
##               2021    #1624   +/-   ##
=========================================
  Coverage     67.13%   67.13%           
  Complexity       20       20           
=========================================
  Files           340      340           
  Lines          8310     8310           
  Branches       1028     1028           
=========================================
  Hits           5579     5579           
  Misses         2244     2244           
  Partials        487      487           

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[SkyeBeFreeman]

LGTM.