FIO deleting test verification files with an empty path (#597)

* FIO deleting test verification files with an empty path

* upversion

* upversion

---------

Co-authored-by: saibulusu <saibulusu@microsoft.com>

Author: saibulusu

VERSION

@@ -1 +1 @@
-2.1.45
+2.1.46

src/VirtualClient/VirtualClient.Actions/FIO/FioExecutor.cs

@@ -494,6 +494,11 @@ protected Task DeleteTestVerificationFilesAsync(IEnumerable<string> testFiles, I
                 foreach (string file in testFiles)
                 {
                     string fileDirectory = Path.GetDirectoryName(file);
+                    if (string.IsNullOrEmpty(fileDirectory))
+                    {
+                        continue;
+                    }
+
                     string[] verificationStateFiles = this.FileSystem.Directory.GetFiles(fileDirectory, "*verify.state");
                     if (verificationStateFiles?.Any() == true)
                     {