Support for PTSP application on aggregated and redundant service PICs

One can configure packet-triggered subscribers and policy control (PTSP) feature on aggregated multiservices (ams) and redundant multiservices (rms) interfaces. For the PTSP functionality, one can use a 1:1 redundancy model to pair two services PICs in high availability mode using a virtual redundant Multiservices PIC (rms) interface. One can also employ an N:1 redundancy mechanism to cluster together N number of msinterfaces in an ams group that supports load sharing for PTSP subscribers.