Show badges for Alumni and Advisors

[devinmatte]

Right now we don't show badges for alumni and advisors due to the nature of it requiring an ldap sync.

1. Call LDAP on first misc signatures of a packet to collect roles
2. On subsequent signatures, check to see if they've signed another packet, if so, pull roles from previous signature to avoid ldap call
3. Update ldap-sync to update roles on all transitions

(We may also want to move in the schema a roles table so that we only pull the data once per person overall)