tests: Delete keys to avoid search mismatch on rerun

Signed-off-by: Jakub Jelen <jjelen@redhat.com>

Author: Jakuje

cryptoki/tests/basic.rs

@@ -2161,6 +2161,9 @@ fn ekdf_aes_cbc_encrypt_data() -> TestResult {
         session.find_objects(&[derived_key_label])?.remove(0)
     );
 
+    // delete keys
+    session.destroy_object(master_key)?;
+    session.destroy_object(derived_key)?;
     Ok(())
 }