[feature] AWS HelenusAuthenticator (#1379)

Signed-off-by: Pedro Silva <pedro.silva@softruck.com>

conn.go

@@ -30,6 +30,7 @@ var (
 		"com.datastax.bdp.cassandra.auth.DseAuthenticator",
 		"io.aiven.cassandra.auth.AivenAuthenticator",
 		"com.ericsson.bss.cassandra.ecaudit.auth.AuditPasswordAuthenticator",
+		"com.amazon.helenus.auth.HelenusAuthenticator",
 	}
 )
 

conn_test.go

@@ -36,6 +36,7 @@ func TestApprove(t *testing.T) {
 		approve("com.instaclustr.cassandra.auth.SharedSecretAuthenticator"): true,
 		approve("com.datastax.bdp.cassandra.auth.DseAuthenticator"):         true,
 		approve("io.aiven.cassandra.auth.AivenAuthenticator"):               true,
+		approve("com.amazon.helenus.auth.HelenusAuthenticator"):             true,
 		approve("com.apache.cassandra.auth.FakeAuthenticator"):              false,
 	}
 	for k, v := range tests {