Fixed constants issue/bug in BaseIPN.php and PaymentProcessor.tpl

There are fixed constants in code referring to autoincrement columns.

Should not be an issue at 99% people, but those, who have non-standart setup for autoincrement fields (like only odd numbers - because of e.g. load-balance DB clusters) it won't work.

In particular:

\CRM\Core\Payment\BaseIPN.php - see attached diff (my version is from 4.3.9)
\templates\CRM\Admin\Page\PaymentProcessor.tpl

• fixed value pp=2 in crmURL-s (e.g. {crmURL q="action=add&reset=1&pp=2"}

  . In my instance I need the value "3".

In Attachment is diff for BaseIPN.php, where I have fixed this using CRM_Member_PseudoConstant::membershipStatus() and array_search.