test: Print message when tests resume

When tests are put on hold after a failure, the user can restart them
with a SIGCONT signal. However, it's often takes a while before any new
output is displayed. This long silence can be disturbing for new users
who may think the SIGCONT signal failed.

This commit prints a simple message to clarify that tests were resumed.
The short sleep before the message display ensures the process is
stopped before the message is displayed.

Signed-off-by: Paul Chaignon <paul@cilium.io>

test/helpers/utils.go

@@ -226,6 +226,8 @@ func HoldEnvironment(description ...string) {
 	fmt.Fprintf(os.Stdout, "\n\nPausing test for debug, use vagrant to access test setup.")
 	fmt.Fprintf(os.Stdout, "\nRun \"kill -SIGCONT %d\" to continue.\n", pid)
 	unix.Kill(pid, unix.SIGSTOP)
+	time.Sleep(time.Millisecond)
+	fmt.Fprintf(os.Stdout, "Test resumed.\n")
 }
 
 // Fail is a Ginkgo failure handler which raises a SIGSTOP for the test process