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 63.88%. Comparing base (a395687) to head (992acb7).
Report is 1 commits behind head on hoxton.

Additional details and impacted files

@@             Coverage Diff              @@
##             hoxton    #1623      +/-   ##
============================================
- Coverage     63.96%   63.88%   -0.08%     
  Complexity       20       20              
============================================
  Files           365      365              
  Lines          8756     8756              
  Branches       1066     1066              
============================================
- Hits           5601     5594       -7     
  Misses         2674     2674              
- Partials        481      488       +7     

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[SkyeBeFreeman]

LGTM.