add integration test scenario: ensure isRaw returns a boolean

[macfarla]

https://github.com/ConsenSys/tessera/blob/095ab4fee41d13bb914b10b366ab8ecc6c6018da/tessera-jaxrs/transaction-jaxrs/src/test/java/com/quorum/tessera/q2t/TransactionResource3Test.java#L699

// TODO: Ensure this is in integration tests
// @test
// public void validationReceiveIsRawMustBeBoolean() {
//
// Response response = jersey.target("transaction").path("MYHASH").queryParam("isRaw",
// "bogus").request().get();
// assertThat(response.getStatus()).isEqualTo(400);
// }