[bgpvpn] Bring in L2/L3 VPN endpoints tests

Closes-Bug: PRODX-11809
Closes-Bug: PRODX-11810
Change-Id: Iac179b592e579916fc36bef79b1a007528a07f36
(cherry picked from commit 35829e1bec9aa92a3cf90d371892dc900d6364ad)
2 files changed