The value of tmnxMobPdnApnChrgCcIgnoreVisit specifies to ignore
HSS or MME supplied charging characteristics for visiting scenarios.
Corresponding default profile is selected when the received charging
characteristics is ignored.
When the value of tmnxMobPdnApnChrgCcIgnoreVisit is 'inherit', the
value is inherited from the value of tmnxMobPdnChrgCcIgnoreVisiting
which specifies to ignore HSS or MME supplied charging characteristics
for visiting scenarios at the gateway level.