[Java][resttemplate] Add test for bearer auth (#17081)

* add bearer auth API to echo-api

* run generate-samples.sh

* add resttemplate echo-api sample

* add bearer auth test

* remove @Ignore

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

@@ -76,3 +76,71 @@ function Test-AuthHttpBasic {
     }
 }
 
+<#
+.SYNOPSIS
+
+To test HTTP bearer authentication
+
+.DESCRIPTION
+
+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-AuthHttpBearer {
+    [CmdletBinding()]
+    Param (
+        [Switch]
+        $WithHttpInfo
+    )
+
+    Process {
+        'Calling method: Test-AuthHttpBearer' | 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')
+
+        $LocalVarUri = '/auth/http/bearer'
+
+        if ($Configuration["AccessToken"]) {
+            $LocalVarHeaderParameters['Authorization'] = "Bearer " + $Configuration["AccessToken"]
+            Write-Verbose ("Using Bearer authentication in {0}" -f $MyInvocation.MyCommand)
+        }
+
+        $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"]
+        }
+    }
+}
+