[Bug] SignedHttpRequestCreationTests.CreateTsClaim is being skipped and needs to be fixed and restored.

[kllysng]

THis test is being skipped and needs to be looked at and fixed/restored.

azure-activedirectory-identitymodel-extensions-for-dotnet/test/Microsoft.IdentityModel.Protocols.SignedHttpRequest.Tests/SignedHttpRequestCreationTests.cs

Line 220 in e43dc2d

[Theory(Skip = "This test failed on build server due to some EpochTime changes, should be fixed later"), MemberData(nameof(CreateTsClaimTheoryData), DisableDiscoveryEnumeration = true)]