tests: decreased failure rate of "tug-of-war between two chassis for …

…the same port"

This test could fail for two reasons:
- on slow systems, the duration of the fight between the hv might
  be longer than expected, resulting in more claims than expected
- if-status module does not implement this 'fight protection'

Signed-off-by: Xavier Simonart <xsimonar@redhat.com>
Acked-by: Ales Musil <amusil@redhat.com>
Signed-off-by: Dumitru Ceara <dceara@redhat.com>
(cherry picked from commit 8a764bd)

tests/ovn.at

@@ -14158,7 +14158,7 @@ echo "hv1 claimed ${hv1_claims} times"
 echo "hv2 claimed ${hv2_claims} times"
 
 # check that neither registered an outrageous number of port claims
-max_claims=10
+max_claims=20
 AT_CHECK([test "${hv1_claims}" -le "${max_claims}"], [0], [])
 AT_CHECK([test "${hv2_claims}" -le "${max_claims}"], [0], [])