Fix for StackOverflow in Swift5 CodeGeneration Issue #8671

[Donkov76]

This is my fix for issue #8671.
As mentioned in the ticket, there may be even better solutions.

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• Read the contribution guidelines.
• Pull Request title clearly describes the work in the pull request and Pull Request description provides details about how to validate the work. Missing information here may result in delayed response from the community.
• [C] Run the following to build the project and update samples:

  ./mvnw clean package 
  ./bin/generate-samples.sh
  ./bin/utils/export_docs_generators.sh
  

  Commit all changed files.
  This is important, as CI jobs will verify all generator outputs of your HEAD commit as it would merge with master.
  These must match the expectations made by your contribution.
  You may regenerate an individual generator by passing the relevant config(s) as an argument to the script, for example ./bin/generate-samples.sh bin/configs/java*.
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[wing328]

--- a/samples/client/petstore/swift5/rxswiftLibrary/docs/FakeAPI.md
+++ b/samples/client/petstore/swift5/rxswiftLibrary/docs/FakeAPI.md
@@ -192,7 +192,7 @@ For this test, the body for this request much reference a schema named `File`.
 // The following code samples are still beta. For any issue, please report via http://github.com/OpenAPITools/openapi-generator/issues/new
 import PetstoreClient
 
-let body = FileSchemaTestClass(file: File(sourceURI: "sourceURI_example"), files: [File(sourceURI: "sourceURI_example")]) // FileSchemaTestClass | 
+let body = FileSchemaTestClass(file: File(sourceURI: "sourceURI_example"), files: [nil]) // FileSchemaTestClass | 
 
 // TODO RxSwift sample code not yet implemented. To contribute, please open a ticket via http://github.com/OpenAPITools/openapi-generator/issues/new
 
diff --git a/samples/client/petstore/swift5/urlsessionLibrary/docs/FakeAPI.md b/samples/client/petstore/swift5/urlsessionLibrary/docs/FakeAPI.md
index 83d9a2873c5..543869c0d2e 100644
--- a/samples/client/petstore/swift5/urlsessionLibrary/docs/FakeAPI.md
+++ b/samples/client/petstore/swift5/urlsessionLibrary/docs/FakeAPI.md
@@ -228,7 +228,7 @@ For this test, the body for this request much reference a schema named `File`.
 // The following code samples are still beta. For any issue, please report via http://github.com/OpenAPITools/openapi-generator/issues/new
 import PetstoreClient
 
-let body = FileSchemaTestClass(file: File(sourceURI: "sourceURI_example"), files: [File(sourceURI: "sourceURI_example")]) // FileSchemaTestClass | 
+let body = FileSchemaTestClass(file: File(sourceURI: "sourceURI_example"), files: [nil]) // FileSchemaTestClass | 
 
 FakeAPI.testBodyWithFileSchema(body: body) { (response, error) in
     guard error == nil else {

Looks like this will result in change in the output (petstore samples).

Can you please run the following to update the samples and commit the change?

./mvnw clean package 
./bin/generate-samples.sh

[wing328]

cc @jgavris (2017/07) @ehyche (2017/08) @Edubits (2017/09) @jaz-ah (2017/09) @4brunu (2019/11)

[wing328]

CI failure not related to this change.

[wing328]

@Donkov76 thanks for the PR, which has been included in the v5.1.0 release: https://twitter.com/oas_generator/status/1373636654024380423