Add -StartServers to build.ps1

This allows running VSTS builds in 1 step.

build.ps1

@@ -3,6 +3,7 @@ param(
     [string] $Version,
     [string] $BuildNumber,
     [bool] $CreatePackages,
+    [switch] $StartServers,
     [bool] $RunTests = $true,
     [string] $PullRequestNumber
 )
@@ -65,6 +66,11 @@ if ($PullRequestNumber) {
 }
 
 if ($RunTests) {
+    if ($StartServers) {
+        Write-Host "Starting all servers for testing: $project (all frameworks)" -ForegroundColor "Magenta"
+        & .\RedisConfigs\start-all.cmd
+        Write-Host "Servers Started." -ForegroundColor "Green"
+    }
     dotnet restore /ConsoleLoggerParameters:Verbosity=Quiet
     foreach ($project in $testsToRun) {
         Write-Host "Running tests: $project (all frameworks)" -ForegroundColor "Magenta"