Investigate/Fix test failure on PowerShell Core

• The "suggests corrections for AliasesToExport with wildcard of UseManifestExportFields is currently set as pending when tests are being run using the coreclr.
  This tests needs to be looked into and possibly fixed.
  The test is here:
  https://github.com/PowerShell/PSScriptAnalyzer/blob/021711eae27a2bd00165f30c6c568a78f448870a/Tests/Rules/UseToExportFieldsInManifest.tests.ps1#L86
• There are 9 test failures using PowerShell Core on Windows and Ubuntu but they do not fail in AppVeyor for some reason. Those tests were always failing, even when going back to an old commit like 9e37dd34e8564dc7470dda1e0d2596de37bcd679 in January. Therefore those failures are to be considered technical debt. Until we know why AppVeyor lets them pass and fix them afterwards, we have to more diligent with running tests locally or on VSTS using PowerShell Core to make sure that we do not introduce regression. The test failures are:
  
  

從所引用測試中的 Tests/Rules/UseToExportFieldsInManifest.tests.ps1 開始，並在 Windows 和 Ubuntu 上使用 PowerShell Core 執行測試套件。將回報的失敗與 AppVeyor 結果進行比較，並判斷列出的九個失敗是測試問題還是環境問題。當這些失敗獲得解釋，且受影響的測試已適當修正或更新時，即視為完成。