fixed test purge integration test wrt flatKS. need to change the impo…

…rt style and corresponding tests

Signed-off-by: Avi Vaid <avaid1996@gmail.com>

cmd/notary/integration_test.go

@@ -1440,6 +1440,7 @@ func TestPurge(t *testing.T) {
 	if len(lines) == 1 && lines[0] == "No signing keys found." {
 		t.Fail()
 	}
+
 	var targetsKeyID string
 	for _, line := range lines[2:] {
 		parts := strings.Fields(line)
@@ -1453,7 +1454,7 @@ func TestPurge(t *testing.T) {
 		t.Fail()
 	}
 
-	err = os.Remove(filepath.Join(tempDir, notary.PrivDir, notary.NonRootKeysSubdir, "gun", targetsKeyID+".key"))
+	err = os.Remove(filepath.Join(tempDir, notary.PrivDir, targetsKeyID+".key"))
 	require.NoError(t, err)
 
 	_, err = runCommand(t, tempDir, "delegation", "purge", "gun", "--key", keyID)