DocumentNameMissingTerminator / DocumentDescriptionMissingTerminator Pkcs tests failing in CI on netfx

[stephentoub]

https://dev.azure.com/dnceng/public/_build/results?buildId=898590&view=ms.vss-test-web.build-test-results-tab&runId=28705146&resultId=113241&paneView=debug

    System.Security.Cryptography.Pkcs.Tests.Pkcs9AttributeTests.DocumentNameMissingTerminator [FAIL]
      Assert.Equal() Failure
                        � (pos 8)
      Expected: My Name!
      Actual:   My Name!ns
                        � (pos 8)
      Stack Trace:
        /_/src/libraries/System.Security.Cryptography.Pkcs/tests/Pkcs9AttributeTests.cs(260,0): at System.Security.Cryptography.Pkcs.Tests.Pkcs9AttributeTests.DocumentNameMissingTerminator()
    System.Security.Cryptography.Pkcs.Tests.Pkcs9AttributeTests.DocumentDescriptionMissingTerminator [FAIL]
      Assert.Equal() Failure
                               � (pos 15)
      Expected: My Description!
      Actual:   My Description!???r
                               � (pos 15)
      Stack Trace:
        /_/src/libraries/System.Security.Cryptography.Pkcs/tests/Pkcs9AttributeTests.cs(187,0): at System.Security.Cryptography.Pkcs.Tests.Pkcs9AttributeTests.DocumentDescriptionMissingTerminator()

These tests were just added in 2e8c4c7 a few hours ago.
cc: @bartonjs

Tagging subscribers to this area: @bartonjs, @vcsjones, @krwq, @jeffhandley
See info in area-owners.md if you want to be subscribed.

Issue Details

---

https://dev.azure.com/dnceng/public/_build/results?buildId=898590&view=ms.vss-test-web.build-test-results-tab&runId=28705146&resultId=113241&paneView=debug

    System.Security.Cryptography.Pkcs.Tests.Pkcs9AttributeTests.DocumentNameMissingTerminator [FAIL]
      Assert.Equal() Failure
                        � (pos 8)
      Expected: My Name!
      Actual:   My Name!ns
                        � (pos 8)
      Stack Trace:
        /_/src/libraries/System.Security.Cryptography.Pkcs/tests/Pkcs9AttributeTests.cs(260,0): at System.Security.Cryptography.Pkcs.Tests.Pkcs9AttributeTests.DocumentNameMissingTerminator()
    System.Security.Cryptography.Pkcs.Tests.Pkcs9AttributeTests.DocumentDescriptionMissingTerminator [FAIL]
      Assert.Equal() Failure
                               � (pos 15)
      Expected: My Description!
      Actual:   My Description!???r
                               � (pos 15)
      Stack Trace:
        /_/src/libraries/System.Security.Cryptography.Pkcs/tests/Pkcs9AttributeTests.cs(187,0): at System.Security.Cryptography.Pkcs.Tests.Pkcs9AttributeTests.DocumentDescriptionMissingTerminator()

These tests were just added in 2e8c4c7 a few hours ago.
cc: @bartonjs

Author:	stephentoub
Assignees:	-
Labels:	area-System.Security, blocking-clean-ci
Milestone:	6.0.0

[safern]

Hit it on: https://dev.azure.com/dnceng/public/_build/results?buildId=899061&view=ms.vss-test-web.build-test-results-tab&runId=28716056&resultId=113119&paneView=debug

[safern]

Issue is: https://github.com/dotnet/core-eng/issues/11507 -- @bartonjs can we disable the tests in the meantime?

[GrabYourPitchforks]

Engineering services said it'll be a few days until the CI issue is resolved. Since we can't leave CI on the floor for that long, I've opened a PR to skip these tests on NetFx.

We should leave this issue open once that PR goes through. That way we can use this same issue to track re-enabling the tests once the CI issue is fully resolved.