public void setSaltIsBase64Encoded(boolean saltIsBase64Encoded) {
        this.saltIsBase64Encoded = saltIsBase64Encoded;
    }
Makes it possible to switch off base64 encoding of password salt.
The default value is true, i.e. expect the salt from a string
value in a database to be base64 encoded.

@param saltIsBase64Encoded the saltIsBase64Encoded to set
core/src/main/java/org/apache/shiro/realm/jdbc/JdbcRealm.java