ClientAndServer_OneOrBothUseDefault_Ok fails with ObjectDisposedException

[Anipik]

Build url https://dev.azure.com/dnceng/public/_build/results?buildId=794173
Log url https://helix.dot.net/api/2019-06-17/jobs/7cda1081-d581-494e-b3aa-83d0911c5f19/workitems/System.Net.Security.Tests/console

    System.Net.Security.Tests.ApmSslStreamSystemDefaultTest.ClientAndServer_OneOrBothUseDefault_Ok(clientProtocols: Tls | Tls11 | Tls12, serverProtocols: Default) [FAIL]
      System.ObjectDisposedException : Safe handle has been closed.
      Object name: 'SafeHandle'.
      Stack Trace:
        /_/src/libraries/System.Private.CoreLib/src/System/Runtime/InteropServices/SafeHandle.cs(148,0): at System.Runtime.InteropServices.SafeHandle.DangerousAddRef(Boolean& success)
        /_/src/libraries/Common/src/Interop/Windows/SspiCli/SecuritySafeHandles.cs(353,0): at System.Net.Security.SafeCredentialReference..ctor(SafeFreeCredentials target)
        /_/src/libraries/Common/src/Interop/Windows/SspiCli/SecuritySafeHandles.cs(340,0): at System.Net.Security.SafeCredentialReference.CreateReference(SafeFreeCredentials target)
        /_/src/libraries/System.Net.Security/src/System/Net/Security/SslSessionsCache.cs(200,0): at System.Net.Security.SslSessionsCache.CacheCredential(SafeFreeCredentials creds, Byte[] thumbPrint, SslProtocols sslProtocols, Boolean isServer, EncryptionPolicy encryptionPolicy)
        /_/src/libraries/System.Net.Security/src/System/Net/Security/SecureChannel.cs(831,0): at System.Net.Security.SecureChannel.GenerateToken(ReadOnlySpan`1 inputBuffer, Byte[]& output)
        /_/src/libraries/System.Net.Security/src/System/Net/Security/SecureChannel.cs(739,0): at System.Net.Security.SecureChannel.NextMessage(ReadOnlySpan`1 incomingBuffer)
        /_/src/libraries/System.Net.Security/src/System/Net/Security/SslStream.Implementation.cs(576,0): at System.Net.Security.SslStream.ProcessBlob(Int32 frameSize)
        /_/src/libraries/System.Net.Security/src/System/Net/Security/SslStream.Implementation.cs(539,0): at System.Net.Security.SslStream.ReceiveBlobAsync[TIOAdapter](TIOAdapter adapter)
        /_/src/libraries/System.Net.Security/src/System/Net/Security/SslStream.Implementation.cs(356,0): at System.Net.Security.SslStream.ForceAuthenticationAsync[TIOAdapter](TIOAdapter adapter, Boolean receiveFirst, Byte[] reAuthenticationData, Boolean isApm)
        /_/src/libraries/Common/src/System/Threading/Tasks/TaskToApm.cs(42,0): at System.Threading.Tasks.TaskToApm.End(IAsyncResult asyncResult)
        /_/src/libraries/System.Net.Security/src/System/Net/Security/SslStream.cs(212,0): at System.Net.Security.SslStream.EndAuthenticateAsClient(IAsyncResult asyncResult)
        /_/src/libraries/System.Private.CoreLib/src/System/Threading/Tasks/FutureFactory.cs(512,0): at System.Threading.Tasks.TaskFactory`1.FromAsyncCoreLogic(IAsyncResult iar, Func`2 endFunction, Action`1 endAction, Task`1 promise, Boolean requiresSynchronization)
        --- End of stack trace from previous location ---
        /_/src/libraries/Common/tests/System/Threading/Tasks/TaskTimeoutExtensions.cs(96,0): at System.Threading.Tasks.TaskTimeoutExtensions.WhenAllOrAnyFailed(Task[] tasks)
        /_/src/libraries/Common/tests/System/Threading/Tasks/TaskTimeoutExtensions.cs(124,0): at System.Threading.Tasks.TaskTimeoutExtensions.WhenAllOrAnyFailed(Task[] tasks)
        /_/src/libraries/Common/tests/System/Threading/Tasks/TaskTimeoutExtensions.cs(84,0): at System.Threading.Tasks.TaskTimeoutExtensions.WhenAllOrAnyFailed(Task[] tasks, Int32 millisecondsTimeout)

cc @dotnet/ncl @ericstj @ViktorHofer

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[wfurt]

dup of #2353