KAZOO-1622: latest curl versions
KAZOO-1622: relax validation for numbers
KAZOO-1622: list numbers contained in port requests
KAZOO-1622: remove the catch in favor of try/catch
KAZOO-1622: verify that numbers are able to be ported

First, check that the number isn't on an existing port request (unless on the current one being edited)
Second, check the numbers DBs to make sure the number isn't there
KAZOO-1622: maintenance routine to refresh the port_requests DB