This attribute specifies the importance of the packets on the path.
One is used for paths carrying the most important traffic, and three
is used for paths carrying the least important traffic. Packets with
lower discardPriority (numerically lower) are discarded after
packets with a higher discardPriority (numerically higher). The
default value for this attribute (sameAsApplication) will cause the
connection's discardPriority to be inherited from the user of the
profile. In other words, setting this attribute to anything other than
the default acts as an override to the priority normally used by the
application linked to this profile.