With new design, peer is deleted from hash table in
cdp_peer_delete. Hash table search in dp_peer_can_reuse
API at cdp_peer_create will always fail
Update the peer reuse logic to search from inactive list.
Insert peer to inactive list from cdp_peer_delete() and
in peer reuse case search in inactive list to get
peer.
Also add a new lock to protect peer state transition
Change-Id: I2e672fc4a9346c95d67716d437538dd0f96b2207