Increase threshold for bonding check

After coreos/bugs#2065
a test for "excessive bonding link status messages"
was introduced which also is good to keep for
coreos/bugs#2374.

However, having this message printed 10 times
does not directly relate to an error.
The test should check if something like
'bond0: Gained carrier' or
'link status definitely up for interface enp0s20f0'
is coming at the end and then continue.
For now, just increase the threshold.

kola/harness.go

@@ -113,7 +113,7 @@ var (
 		{
 			// https://github.com/coreos/bugs/issues/2065
 			desc:  "excessive bonding link status messages",
-			match: regexp.MustCompile("(?s:link status up for interface [^,]+, enabling it in [0-9]+ ms.*?){10}"),
+			match: regexp.MustCompile("(?s:link status up for interface [^,]+, enabling it in [0-9]+ ms.*?){20}"),
 		},
 		{
 			// https://github.com/coreos/bugs/issues/2180