(GH-1153) Fix discovery tests

Prior to this change, the discovery tests referenced the path
to test files for the PowerShell adapter by folder. This change
corrects those paths to their new location.

Author: michaeltlombardi

dsc/tests/dsc_discovery.tests.ps1

@@ -109,7 +109,7 @@ Describe 'tests for resource discovery' {
 
         # perform List on an adapter - this should create adapter lookup table file
         $oldPSModulePath = $env:PSModulePath
-        $TestClassResourcePath = Resolve-Path "$PSScriptRoot/../../powershell-adapter/Tests"
+        $TestClassResourcePath = Resolve-Path "$PSScriptRoot/../../adapters/powershell/Tests"
         $env:DSC_RESOURCE_PATH = $null
         $env:PSModulePath += [System.IO.Path]::PathSeparator + $TestClassResourcePath
         dsc resource list -a Microsoft.DSC/PowerShell | Out-Null
@@ -126,7 +126,7 @@ Describe 'tests for resource discovery' {
 
         # perform Get on an adapter - this should create adapter lookup table file
         $oldPSModulePath = $env:PSModulePath
-        $TestClassResourcePath = Resolve-Path "$PSScriptRoot/../../powershell-adapter/Tests"
+        $TestClassResourcePath = Resolve-Path "$PSScriptRoot/../../adapters/powershell/Tests"
         $env:DSC_RESOURCE_PATH = $null
         $env:PSModulePath += [System.IO.Path]::PathSeparator + $TestClassResourcePath
         "{'Name':'TestClassResource1'}" | dsc resource get -r 'TestClassResource/TestClassResource' -f - | Out-Null
@@ -139,7 +139,7 @@ Describe 'tests for resource discovery' {
     It 'Verify adapter lookup table is used on repeat invocations' {
 
         $oldPSModulePath = $env:PSModulePath
-        $TestClassResourcePath = Resolve-Path "$PSScriptRoot/../../powershell-adapter/Tests"
+        $TestClassResourcePath = Resolve-Path "$PSScriptRoot/../../adapters/powershell/Tests"
         $env:DSC_RESOURCE_PATH = $null
         $env:PSModulePath += [System.IO.Path]::PathSeparator + $TestClassResourcePath