unittests: Fixes unit tests for Windows (part 10)

Currently, there are some unit tests that are failing on
Windows due to various reasons:

- Different "File not found" error messages on Windows.
- Files need to be closed on Windows before removing them.
- The default RootHnsEndpointName (root-hnsendpoint-name) flag value is 'cbr0'
- On Windows, Unix Domain sockets are not checked in the same way in golang, which is why
  hostutils_windows.go checks for it differently. GetFileType will return an error in this
  case. We need to check for it, and see if it's actually a Unix Domain Socket.

pkg/volume/util/hostutil/hostutil_windows.go

@@ -106,7 +106,7 @@ func (hu *(HostUtil)) GetFileType(pathname string) (FileType, error) {
 
 	// os.Stat will return a 1920 error (windows.ERROR_CANT_ACCESS_FILE) if we use it on a Unix Socket
 	// on Windows. In this case, we need to use a different method to check if it's a Unix Socket.
-	if isSystemCannotAccessErr(err) {
+	if err == errUnknownFileType || isSystemCannotAccessErr(err) {
 		if isSocket, errSocket := filesystem.IsUnixDomainSocket(pathname); errSocket == nil && isSocket {
 			return FileTypeSocket, nil
 		}