Type of INBOX_ID column in inbox table is too narrow

[yevhenii-nadtochii]

JdbcInboxStorage fails to insert a new message to inbox due to a too narrow type of INBOX_ID column:

com.mysql.cj.jdbc.exceptions.MysqlDataTruncation: Data truncation: Data too long for column 'INBOX_ID' at row 1.

The possible workaround can be specifying of a custom TypeMapping that effectively substitutes all VARCHAR(255) column types to VARCHAR(512):

TypeMapping typeMapping = TypeMappingBuilder.basicBuilder()
        .add(Type.STRING_255, "VARCHAR(512)")
        .build();
JdbcStorageFactory factory = JdbcStorageFactory.newBuilder()
        .setTypeMapping(typeMapping)
        .setDataSource(dataSource)
        .build();

[armiol]

Addressed in 1.x via #168.