Add Port to MySQL ConnectionString builder

[DiogoBarros90]

This builder needed to be extended to allow port specification.

Implements #405

[danilobreda]

@DiogoBarros90 there is some tests if the password have spaces ?

On the SqlServer ConnectionString Builder i had a problem with it... i needed to add double quotes on the password or username if its with space.

[SkydivingAngel]

I made changes to the downloaded source code:

Changes made in MySQLConnectionStringBuilder Class:

Added:

	private string port = "3306";

Added:

	public MySQLConnectionStringBuilder Port(string port)
	{
		this.port = port;
		IsDirty = true;
		return this;
	}

Changed:

	protected internal override string Create()
	{
		var connectionString = base.Create();

		if (!string.IsNullOrEmpty(connectionString))
			return connectionString;

		var sb = new StringBuilder();

		sb.AppendFormat("Server={0};Database={1};User ID={2};Password={3};Port={4}", server, database, username, password, port);

		return sb.ToString();
	}

so it can be used this way:

	MySQLConfiguration connection01 = MySQLConfiguration.Standard
	.ConnectionString(c => c
	.Server("localhost")
	.Database(dbName)
	.Username("xxxx")
	.Password("yyyy")
	.Port("3308")
	)

Full Example:

public class SessionFactoryCreator
{
    public static ISessionFactory GetSession(string dbName = "Test", byte timeout = 10)
    {
        MySQLConfiguration connection = MySQLConfiguration.Standard
            .ConnectionString(c => c
                .Server("localhost")
                .Database(dbName)
                .Username("xxx")
                .Password("yyy")
                .Port("3306")
            )
            .ShowSql().FormatSql();

        ISessionFactory sessionFactory = Fluently.Configure()
            .Database(connection)
            .Cache(cacheBuilder =>
            {
                cacheBuilder.UseQueryCache();
                cacheBuilder.UseSecondLevelCache().ProviderClass<NHibernate.Cache.HashtableCacheProvider>();
            })
            .Mappings(mapper =>
            {
                mapper.FluentMappings.Add<FirstMap>();
                mapper.FluentMappings.Add<SecondMap>();
            })
            .ExposeConfiguration(cfg =>
            {
                cfg.SetProperty(NHibernate.Cfg.Environment.CommandTimeout, "180");
                cfg.SetProperty(NHibernate.Cfg.Environment.ReleaseConnections, "after_transaction");
                cfg.SetProperty(NHibernate.Cfg.Environment.BatchSize, "1000");
                new SchemaUpdate(cfg).Execute(false, true);
            })
            .BuildSessionFactory();

        return sessionFactory;
    }
}