tests: The bgp_flowspec frequently fails try to gather more data

Add a bit of code to allow the bgp_flowspec topotest to gather
data when something goes wrong.

Signed-off-by: Donald Sharp <[email protected]>

tests/topotests/bgp_flowspec/test_bgp_flowspec_topo.py

@@ -51,6 +51,7 @@
 from lib import topotest
 from lib.topogen import Topogen, TopoRouter, get_topogen
 from lib.topolog import logger
+from lib.common_config import generate_support_bundle
 
 # Required to instantiate the topology builder class.
 
@@ -139,7 +140,9 @@ def test_bgp_convergence():
     )
     _, res = topotest.run_and_expect(test_func, None, count=90, wait=0.5)
     assertmsg = "BGP router network did not converge"
-    assert res is None, assertmsg
+    if res is not None:
+        generate_support_bundle()
+        assert res is None, assertmsg
 
 
 def test_bgp_flowspec():