Add scripts for VSTS to pick PSES branches to include

tools/releaseBuild/findPsesBuild.ps1

@@ -0,0 +1,9 @@
+$branch = [uri]::EscapeDataString($env:PSES_BRANCH)
+$buildsUrl = $env:VSTS_PSES_URL_TEMPLATE -f $branch
+$headers = @{Authorization = "Bearer $env:SYSTEM_ACCESSTOKEN"}
+$builds = Invoke-RestMethod -ContentType application/json -Uri $buildsUrl -Headers $headers
+Write-Host "Got PSES_BRANCH: ${env:PSES_BRANCH}"
+Write-Host "Requested URL: $buildsUrl"
+Write-Host "Got response:`n$(ConvertTo-Json $builds)"
+Write-Host "setting PSES_BUILDID to $($builds.value[0].Id)"
+Write-Host "##vso[task.setvariable variable=PSES_BUILDID]$($builds.value[0].Id)"

tools/releaseBuild/setVstsVariables.ps1

@@ -0,0 +1,11 @@
+$vstsVariables = @{
+    PSES_BRANCH = 'master'
+}
+
+# Use VSTS's API to set an env vars
+foreach ($var in $vstsVariables.Keys)
+{
+    $val = $vstsVariables[$var]
+    Write-Host "Setting var '$var' to value '$val'"
+    Write-Host "##vso[task.setvariable variable=$var]$val"
+}