Ability to add trackers manually should be restricted to multi-sig admin group

[CharlieMc0]

Currently, trackers can be manually added by O/S operators and the admin group. This should be restricted to the admin group only because an attacker must compromise multiple signers to submit a false tracker. Under the current model a single operator being compromised could result in submission of false or malicious trackers.

zetacored tx crosschain add-to-out-tx-tracker

[kingpinXD]

Closing this in Favor of
#1318