remote,test: remove .dockerignore which is a symlink

It seems certain test infrastructure prevents cloning repo which
contains symlink outside of the repo itself, generate symlink for such
test by the testsuite itself just before running test and remove it when
test is completed.

Signed-off-by: Aditya R <arajan@redhat.com>

test/e2e/build_test.go

@@ -441,13 +441,24 @@ RUN find /test`, CITEST_IMAGE)
 	It("podman remote build must not allow symlink for ignore files", func() {
 		// Create a random file where symlink must be resolved
 		// but build should not be able to access it.
-		f, err := os.Create(filepath.Join("/tmp", "private_file"))
+		privateFile := filepath.Join("/tmp", "private_file")
+		f, err := os.Create(private_file)
 		Expect(err).ToNot(HaveOccurred())
 		// Mark hello to be ignored in outerfile, but it should not be ignored.
 		_, err = f.WriteString("hello\n")
 		Expect(err).ToNot(HaveOccurred())
 		defer f.Close()
 
+		//Create .dockerignore which is a symlink to /tmp/private_file.
+		currentDir, err := os.Getwd()
+		Expect(err).ToNot(HaveOccurred())
+		ignoreFile := filepath.Join(currentDir, "build/containerignore-symlink/.dockerignore")
+		err = os.Symlink(privateFile, ignoreFile)
+		// Remove created .dockerignore for this test when test ends.
+		defer func() {
+			os.Remove(ignoreFile)
+		}()
+
 		if IsRemote() {
 			podmanTest.StopRemoteService()
 			podmanTest.StartRemoteService()