Allow multiple attempts in egress firewall test

this test is failing when using kata-containers, which might be related
to longer startup times of kata-containers:

    curl: (28) Connection timed out after 1001 milliseconds

let's use the "--retry" feature of curl. This should not affect the
successful tests as they should return immediately, while it might
prolong the failing tests from 3s to 30s. With kata we need about 6-12s
so 30s should be safe for us.

Signed-off-by: Lukáš Doktor <[email protected]>

Author: ldoktor

test/extended/networking/egress_firewall.go

@@ -151,7 +151,7 @@ func sendEgressFwTraffic(f *e2e.Framework, mgmtFw *e2e.Framework, oc *exutil.CLI
 	// Test curl to redhat.com should pass
 	// because we have allow dns rule for redhat.com
 	g.By("sending traffic that matches allow dns rule")
-	_, err = oc.Run("exec").Args(pod, "--", "curl", "-q", "-s", "-I", "-m3", "https://redhat.com").Output()
+	_, err = oc.Run("exec").Args(pod, "--", "curl", "-q", "-s", "-I", "-m3", "--retry", "10", "--retry-all-errors", "https://redhat.com").Output()
 	expectNoError(err)
 
 	if checkWildcard {