KAZOO-2092 apply reschedule rules for faxes

attempt :  integer() | "any"
if "any" or field is absent applyies to any attempt
retry-after : seconds
configure in system_config/fax document

"reschedule": {
       "rule-name": {
           "attempt": 1 
           "compare-field": "result_code", 
           "compare-value": 500,
           "retry-after": 120,
           "new-retry-count": 7
       }
   }