categoryKuser deleted event addition

SUP-2132 #time 1d
raising event for deleting pending as well + template creation fix

SUP-2132 #time 15m
migration & partner 0 template-fix scripts

SUP-2132 #time 0.5h
identataion fix
comments editing
different location for XML script
release notes addition
Merge pull request #1743 from kaltura/IX-9.19.4-SUP-2132

Ix 9.19.4 sup 2132