acl: memory leak in acl_fa_session_cleaner_process
acl: memory leak in acl_fa_session_cleaner_process

The statement
  pw0->pending_clear_sw_if_index_bitmap =
    clib_bitmap_dup (pw0->serviced_sw_if_index_bitmap);
will cause pw0->pending_clear_sw_if_index_bitmap's previous
vector to be gone. Need to free it prior to calling clib_bitmap_dup()

Type: fix

Signed-off-by: Steven Luong <a748ea44ad7b179c2313a856d44e1e4eb39869bb@cisco.com>
Change-Id: I20de780e73daea7be17efa0bf660af2592cd4680

FDio/vpp,chrisy/vpp,FDio/vpp,chrisy/vpp,FDio/vpp,chrisy/vpp,chrisy/vpp,FDio/vpp,chrisy/vpp,chrisy/vpp,FDio/vpp,FDio/vpp,chrisy/vpp,FDio/vpp,FDio/vpp,chrisy/vpp