make test: relax BFD time intervals

Increased time intervals mean longer test runs, but also reduce
the chance of getting annoying (especially in gerrit) random failures.
Now that tests are split into `basic' and `all', the increased runtime
of BFD tests (of which majority doesn't run in basic case) doesn't
matter too much..

Change-Id: I4a15bb4facad634f123bc9cc6f45eddbf4976fd1
Signed-off-by: Klement Sekera <ksekera@cisco.com>
diff --git a/test/bfd.py b/test/bfd.py
index d1d948b..452a180 100644
--- a/test/bfd.py
+++ b/test/bfd.py
@@ -237,7 +237,7 @@
     """ Represents BFD UDP session in VPP """
 
     def __init__(self, test, interface, peer_addr, local_addr=None, af=AF_INET,
-                 desired_min_tx=100000, required_min_rx=100000, detect_mult=3,
+                 desired_min_tx=300000, required_min_rx=300000, detect_mult=3,
                  sha1_key=None, bfd_key_id=None):
         self._test = test
         self._interface = interface