IPACM: restore old connections when LTE up again

When LTE backhaul quickly down and up again, the old
UDP connections are taking SW-path. The fix is to cache
all current connection entries on Apps and retore the NAT
entries if LTE comes up with same ipv4 address. Also cache
the flows if IPA-NAT tbl haven't created.

Change-Id: Ie7dbac071d3c977507d9dd18985340c454c48e34
4 files changed
tree: a967f5cd49f5b7b7c93a2e58a49b88753d0808fe
  1. ipacm/
  2. ipanat/
  3. configure.ac
  4. Makefile.am