build(connector-corda): fix various Unresolved reference kotlin compiler errors

[petermetz]

1. Started overriding a specific template (dataClass.mustache) in the
   main-server sub-package of the corda connector because of issues that
   are further explained here [1] and here [2].
2. Also had to update generator configuration to specifically exclude
   spring-doc generation because it seems to be broken within the template
   as well: it does not provide updated dependencies for the grandle and
   maven manifests and so the io.swagger.core.v3:swagger-annotations package
   was missing and failing the build in a second way.
3. The example value for the return array of ListFlowsV1Response in
   the openapi.json spec file of the corda connector was containing dollar
   signs ($) which ended up being appended to the kotlin code's annotations
   as documentation, but the dollar signs have a special meaning in kotlin
   and lead to syntax errors. Updating the examples to not have dollar signs
   in the openapi.json specification document resulted in fixing this issue.
4. Also updated the artifact version in the openapi generator configuration
   file. This is just a temporary fix, what we really need is scripts bumping
   this up as part of the automated release process.

[1] OpenAPITools/openapi-generator#8366 (comment)
[2] OpenAPITools/openapi-generator#17008

Fixes #2662

Signed-off-by: Peter Somogyvari [email protected]

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A Must Read for Beginners
For rebasing and squashing, here's a must read guide for beginners.

[outSH]

LGTM

[jagpreetsinghsasan]

LGTM