openapi-generator script and java.vml configuration need refinements

[dasarathirout]

Unknown Dependency defined openapi/java.xml( which is not present in maven artifactory

•     <dependency>
      <groupId>org.openapitools</groupId>
      <artifactId>client-java-api-openapi-generator</artifactId>
      <version>${openapi-generator-version}</version>
    </dependency>
  

  Dependency 'org.openapitools:client-java-api-openapi-generator:7.13.0' not found

  Under mvn repository https://mvnrepository.com/artifact/org.openapitools thereis no artifact-id :
  org.openapitools:client-java-api-openapi-generator

• openapi/openapi-generator/generate_client_in_container.sh maven arguments contains non-standard arguments list.

    -D=generator.client.version="${CLIENT_VERSION}"
    -D=generator.package.name="${PACKAGE_NAME}"
    -D=openapi-generator-version="${PLUGIN_VERSION}"

maven-cli user argument should follow -Dkey1=Valur2,--defineKey2=Value2