Qscript to Add, delete or list client data interface pair.

User can add or delete one data interface pair, 
	delete or list all data interface pairs for a given client, 
	delete or list all data interface pairs for all clients

Usage:

qoperation execscript -sn DataInterfacePairConfig.sql -si add|delete -si clientName_1 -si clientInterface_1 -si clientName_2 -si clientInterface_2

qoperation execscript -sn DataInterfacePairConfig.sql -si deleteByClient|listByClient -si clientName

qoperation execscript -sn DataInterfacePairConfig.sql -si deleteAll|listAll