The return type (schema) of the `postTagByProject` method is `Branch` instead of `Tag`

[csanadtelbisz]

The return type (schema) of the postTagByProject method is Branch instead of Tag. This leads to several issues in the generated files, too. See: openapi.yaml.

SysML v2 API Java client version: 2021-09 (commit: Merge branch 'release/2021-09' on Oct 15, 2021)

Steps to reproduce:

• Using the api client, create a project and a commit.
• Send a request to post a tag pointing to the created commit.

The following simple project reproduces the problem: api-client-bug-report.zip. Essential part:

val projectApi = ProjectApi(defaultClient)
val commitApi = CommitApi(defaultClient)
val tagApi = TagApi(defaultClient)
//...
val project = projectApi.postProject(Project().apply {
    name = "demo project"
})
val commit = commitApi.postCommitByProject(project.atId, Commit(), null) // An empty commit is added
tagApi.postTagByProject(project.atId, Tag().apply {
    name = "my_tag"
    taggedCommit = BranchHead().atId(commit.atId)
}) // Exception: Unexpected value 'Tag'

Expected output: the posted tag is returned.

Actual output: the pilot server implementation correctly returns a Tag which results in an exception when the client deserializes the result (because a Branch is expected).
Stack trace:

Exception in thread "main" java.lang.IllegalArgumentException: Unexpected value 'Tag'
	at org.omg.sysml.model.Branch$AtTypeEnum.fromValue(Branch.java:68)
	at org.omg.sysml.model.Branch$AtTypeEnum$Adapter.read(Branch.java:80)
	at org.omg.sysml.model.Branch$AtTypeEnum$Adapter.read(Branch.java:71)
	at com.google.gson.TypeAdapter$1.read(TypeAdapter.java:199)
	at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$1.read(ReflectiveTypeAdapterFactory.java:131)
	at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.read(ReflectiveTypeAdapterFactory.java:222)
	at com.google.gson.Gson.fromJson(Gson.java:932)
	at com.google.gson.Gson.fromJson(Gson.java:897)
	at com.google.gson.Gson.fromJson(Gson.java:846)
	at org.omg.sysml.JSON.deserialize(JSON.java:163)
	at org.omg.sysml.ApiClient.deserialize(ApiClient.java:775)
	at org.omg.sysml.ApiClient.handleResponse(ApiClient.java:978)
	at org.omg.sysml.ApiClient.execute(ApiClient.java:905)
	at org.omg.sysml.api.TagApi.postTagByProjectWithHttpInfo(TagApi.java:590)
	at org.omg.sysml.api.TagApi.postTagByProject(TagApi.java:567)
	at MainKt.main(Main.kt:24)
	at MainKt.main(Main.kt)