message: fix expected exception
diff: @@ -78,20 +78,14 @@ public class PackUnpackMessageTest extends IndyIntegrationTestWithSingleWallet {
  }
  @Test
  - public void testUnpackMessageErrorsWithInvalidPackedMessageStructure() {
  + public void testUnpackMessageErrorsWithInvalidPackedMessageStructure() throws Exception {
  String packedMessage = "jibberish";
  thrown.expect(ExecutionException.class);
  - thrown.expectCause(isA(InvalidStructureException.class));
  + thrown.expectCause(isA(InvalidParameterException.class));
  +
  + Crypto.unpackMessage(wallet, packedMessage.getBytes()).get();
  - try {
  - CompletableFuture<byte[]> future = Crypto.unpackMessage(wallet, packedMessage.getBytes());
  - assertTrue(future.isCompletedExceptionally());
  - } catch (Exception e) {
  - // expected
  - System.err.println("testUnpackMessageErrorsWithInvalidPackedMessageStructure threw " + e);
  - return;
  - }
  // this assert should never trigger since unpackMessage should throw exception
  assertTrue(false);
  }
  