add scheme name and code to group header + add organization_id/private_i...

-add scheme name and code to group header
Some banks needs a structure like this(with tags SchemeNm/Cd with value 'CORE'):
<InitgPty>
        <Nm>nom-presentador</Nm>
        <Id>
          <OrgId>
            <Othr>
              <Id>ZZ00001X11111111</Id>
              <SchmeNm>
                <Cd>CORE</Cd>
              </SchmeNm>
            </Othr>
          </OrgId>
        </Id>
</InitgPty>

-add organization_id/private_id init array
'group_header' => array(
			'company_name' => 'Amazing SRL ȘȚțș ыаывпавпва '
			'organisation_id'  => 'id_X' // or 'private_id' => 'id_Y'
),