[Java RESTEasy client] updating test to use the Java RESTEasy echo api client (#17367) (#17470)

* updating test to use the Java RESTEasy echo api client (#17367)

* regenerated samples

* set source and target to 1.8 to fix workflow failure, adapted parser

samples/client/echo_api/powershell/src/PSOpenAPITools/Api/BodyApi.ps1

@@ -223,6 +223,82 @@ function Test-BodyMultipartFormdataArrayOfBinary {
 <#
 .SYNOPSIS
 
+Test single binary in multipart mime
+
+.DESCRIPTION
+
+No description available.
+
+.PARAMETER MyFile
+No description available.
+
+.PARAMETER WithHttpInfo
+
+A switch when turned on will return a hash table of Response, StatusCode and Headers instead of just the Response
+
+.OUTPUTS
+
+String
+#>
+function Test-BodyMultipartFormdataSingleBinary {
+    [CmdletBinding()]
+    Param (
+        [Parameter(Position = 0, ValueFromPipeline = $true, ValueFromPipelineByPropertyName = $true, Mandatory = $false)]
+        [System.IO.FileInfo]
+        ${MyFile},
+        [Switch]
+        $WithHttpInfo
+    )
+
+    Process {
+        'Calling method: Test-BodyMultipartFormdataSingleBinary' | Write-Debug
+        $PSBoundParameters | Out-DebugParameter | Write-Debug
+
+        $LocalVarAccepts = @()
+        $LocalVarContentTypes = @()
+        $LocalVarQueryParameters = @{}
+        $LocalVarHeaderParameters = @{}
+        $LocalVarFormParameters = @{}
+        $LocalVarPathParameters = @{}
+        $LocalVarCookieParameters = @{}
+        $LocalVarBodyParameter = $null
+
+        $Configuration = Get-Configuration
+        # HTTP header 'Accept' (if needed)
+        $LocalVarAccepts = @('text/plain')
+
+        # HTTP header 'Content-Type'
+        $LocalVarContentTypes = @('multipart/form-data')
+
+        $LocalVarUri = '/body/application/octetstream/single_binary'
+
+        if ($MyFile) {
+            $LocalVarFormParameters['my-file'] = $MyFile
+        }
+
+        $LocalVarResult = Invoke-ApiClient -Method 'POST' `
+                                -Uri $LocalVarUri `
+                                -Accepts $LocalVarAccepts `
+                                -ContentTypes $LocalVarContentTypes `
+                                -Body $LocalVarBodyParameter `
+                                -HeaderParameters $LocalVarHeaderParameters `
+                                -QueryParameters $LocalVarQueryParameters `
+                                -FormParameters $LocalVarFormParameters `
+                                -CookieParameters $LocalVarCookieParameters `
+                                -ReturnType "String" `
+                                -IsBodyNullable $false
+
+        if ($WithHttpInfo.IsPresent) {
+            return $LocalVarResult
+        } else {
+            return $LocalVarResult["Response"]
+        }
+    }
+}
+
+<#
+.SYNOPSIS
+
 Test free form object
 
 .DESCRIPTION