Fixed race condition in FileName test

TEST(FileName, NewVersion) {

  std::ofstream fileStream;

  fileStream.open("test000001.cub");

  fileStream.open("NewVersion000001.cub");

  fileStream << "test";

  fileStream.close();

  fileStream.open("test000002.cub");

  fileStream.open("NewVersion000002.cub");

  fileStream << "test";

  fileStream.close();

  FileName file("test??????.cub");

  EXPECT_EQ("./test000003.cub", file.newVersion().expanded());

  remove("test000001.cub");

  remove("test000002.cub");

  remove("test000003.cub");

  FileName file("NewVersion??????.cub");

  EXPECT_EQ("./NewVersion000003.cub", file.newVersion().expanded());

  remove("NewVersion000001.cub");

  remove("NewVersion000002.cub");

  remove("NewVersion000003.cub");

}

TEST(FileName, FileExists) {

  std::ofstream fileStream;

  fileStream.open("test000001.cub");

  fileStream.open("FileExists000001.cub");

  fileStream << "test";

  fileStream.close();

  FileName realFile("test000001.cub");

  FileName realFile("FileExists000001.cub");

  EXPECT_TRUE(realFile.fileExists());

  FileName fakeFile("test.cub");

  EXPECT_FALSE(fakeFile.fileExists());

  remove("test000001.cub");

  remove("FileExists000001.cub");

}

TEST(FileName, CreateTempFile) {