Fix swagger tool client and mock generation

[NipunaMarcus]

Purpose

This will fix the client generated code syntax issues and parameter defining issue.

Goals

Fix related to the issue #11461

[codecov-io]

Codecov Report

❗ No coverage uploaded for pull request base (master@54c9116). Click here to learn what that means.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master   #12959   +/-   ##
=========================================
  Coverage          ?   59.38%           
  Complexity        ?      659           
=========================================
  Files             ?     2109           
  Lines             ?   103245           
  Branches          ?    13172           
=========================================
  Hits              ?    61313           
  Misses            ?    36738           
  Partials          ?     5194

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