all tests are now marked with proper tag

also, update build.psm1 to be more flexible

test/powershell/Modules/PackageManagement/Get-Package.Tests.ps1

@@ -18,7 +18,7 @@ $source = "http://www.nuget.org/api/v2/"
 
 # Actual Tests:
 
-Describe "Get-package" -Tags @('BVT', 'DRT'){
+Describe "Get-package" -Tags "Feature" {
     # make sure that packagemanagement is loaded
     It "EXPECTED: Get-package accepts array of strings for -providername parameter" -Skip {
         $x = (get-package -providername Programs,Msi)

test/powershell/Modules/PackageManagement/Get-PackageProvider.Tests.ps1

@@ -72,7 +72,7 @@ Describe "get-packageprovider" -Tags "CI" {
 }
 
 
-Describe "Get-PackageProvider with list" Tags "CI" {
+Describe "Get-PackageProvider with list" -Tags "CI" {
 
     It "lists package providers installed" {
         $x = (Get-PackageProvider).Count -gt 1 | should be $true