Revert tests/Directory.Build.props: restore MSAL_SKIP_FEDERATED_TESTS condition to control ADFS test skipping

Author: RyAuld

tests/Directory.Build.props

@@ -6,9 +6,7 @@
   <PropertyGroup Condition="'$(PipelineType)' == 'OneBranch'">
     <DefineConstants>$(DefineConstants);ONEBRANCH_BUILD</DefineConstants>
   </PropertyGroup>
-  <!-- ADFS tests are enabled by default. Uncomment to allow pipeline to skip them via MSAL_SKIP_FEDERATED_TESTS=True.
-  <PropertyGroup Condition="'$(MSAL_SKIP_FEDERATED_TESTS)' == 'True'">
+  <PropertyGroup Condition="'$(MSAL_SKIP_FEDERATED_TESTS)' == 'False'">
     <DefineConstants>$(DefineConstants);IGNORE_FEDERATED</DefineConstants>
   </PropertyGroup>
-  -->
 </Project>