Server without DTLS

[bboeck]

Since M4 it is not possible to create a server without using dtls.

public static void main (String args[]) {
    	LeshanServerBuilder builder = new LeshanServerBuilder();
        builder.disableSecuredEndpoint();
        LeshanServer server = builder.build();
        server.start();
    }

Even if disableSecuredEndpoint is set, I get the following exception

Exception in thread "main" java.lang.IllegalStateException: Supported cipher suites must be set either explicitly or implicitly by means of setting the identity or PSK store
	at org.eclipse.californium.scandium.config.DtlsConnectorConfig$Builder.build(DtlsConnectorConfig.java:872)
	at org.eclipse.leshan.server.californium.LeshanServerBuilder.build(LeshanServerBuilder.java:404)

[sbernard31]

Thx a lot @bboeck to report that.
It should be fixed by #397.

Nice shirt by the way ;)

[sbernard31]

Fixed in master (commit cd08129)