Fix main provider flow to try other bearer token providers if exchanging for a session token fails.

Add exception handling to continue trying other bearer token providers if one throws.

Author: zarenner

Build.props

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <PropertyGroup>
-    <CredentialProviderVersion>0.1.7</CredentialProviderVersion>
+    <CredentialProviderVersion>0.1.8</CredentialProviderVersion>
   </PropertyGroup>
 </Project>