bgpd: Note routemap information even if peer not activated.

bgpd: Note routemap information even if peer not activated.

If upon bgp startup we have this config:

router bgp 64540
 neighbor 192.168.201.134 remote-as external
 !
 address-family ipv4 unicast
  no neighbor 192.168.201.134 activate
  neighbor 192.168.201.134 route-map NEXTHOP in
 exit-address-family

The route-map map pointer for the incoming(or outgoing)
filter was not being saved due to a pre-mature optimization
of not handling the routemap callback if the peer is not
activated.  The function that handles the peers route-maps
is making sure that the peer is in established state
before attempting to actually apply anything so just
call it to set the map pointer.

Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>