Add PowerShell version of request_tower_configuration. From @nitzmahone.

tools/scripts/request_tower_configuration.ps1

@@ -0,0 +1,40 @@
+Param(
+    [string]$tower_url,
+    [string]$host_config_key,
+    [string]$job_template_id
+)
+
+Set-StrictMode -Version 2
+$ErrorActionPreference = "Stop"
+
+If(-not $tower_url -or -not $host_config_key -or -not $job_template_id)
+{
+    Write-Host "Requests server configuration from Ansible Tower"
+    Write-Host "Usage: $($MyInvocation.MyCommand.Name) <server address>[:server port] <host config key> <job template id>"
+    Write-Host "Example: $($MyInvocation.MyCommand.Name) example.towerhost.net 44d7507f2ead49af5fca80aa18fd24bc 38"
+    Exit 1
+}
+
+$retry_attempts = 10
+$attempt = 0
+
+$data = @{
+    host_config_key=$host_config_key
+}
+
+While ($attempt -lt $retry_attempts) {
+    Try {
+        $resp = Invoke-WebRequest -Method POST -Body $data -Uri http://$tower_url/api/v1/job_templates/$job_template_id/callback/ -UseBasicParsing
+
+        If($resp.StatusCode -eq 202) {
+            Exit 0
+        }
+    }
+    Catch {
+        $ex = $_
+        $attempt++
+        Write-Host "$([int]$ex.Exception.Response.StatusCode) received... retrying in 1 minute (Attempt $attempt)"
+    }
+    Start-Sleep -Seconds 60
+}
+Exit 1