pimd: replay IGMP static group upon if creation

pimd: replay IGMP static group upon if creation

Upon static IGMP configured port down igmp source info is destroyed.
Upon port up or quagga restart (if addr add) register IGMP sock with
port, source, group.

Testing Done:
Configure IGMPv3 Report on Host swpx, ifdown/ifup swpx,
verify ip mroute containng IGMP mroute

tor-1# show ip mroute
Source          Group           Proto  Input      Output     TTL  Uptime
30.1.1.1        225.1.1.21      IGMP   swp2       swp3       1    00:00:05

Signed-off-by: Chirag Shah <chirag@cumulusnetworks.com>