Adding programmatic configuration for Hazelcast in embedded vert.x

Usage:

Config cfg = ProgrammableClusterManagerFactory.getConfig();

NetworkConfig network = cfg.getNetworkConfig();
network.setPort(5900);
network.setPortAutoIncrement(false);
Join join = network.getJoin();
join.getMulticastConfig().setEnabled(false);
join.getTcpIpConfig().addMember("10.45.67.32").addMember("10.45.67.100").setEnabled(true);

PlatformManager pm = PlatformLocator.factory.createPlatformManager(1234,"127.0.0.1");