private/testplanet: configurable timeout

Testplanet limits the execution of a single test case to 3 minutes.

This change adds a Timeout field to the Testplanet's config, so test
cases can configure their timeout. This is helpful when executing larger
3rd party test suite on top of Testplanet.

Change-Id: Ibbf7c5ffdc0a9e723e7e28b885eac084f04c6ca1

private/testplanet/planet.go

@@ -63,6 +63,7 @@ type Config struct {
 	Name        string
 	Host        string
 	NonParallel bool
+	Timeout     time.Duration
 }
 
 // DatabaseConfig defines connection strings for database.

private/testplanet/run.go

@@ -46,7 +46,11 @@ func Run(t *testing.T, config Config, test func(t *testing.T, ctx *testcontext.C
 				defer pprof.SetGoroutineLabels(parent)
 				parent = pprof.WithLabels(parent, pprof.Labels("test", t.Name()))
 
-				ctx := testcontext.NewWithContext(parent, t)
+				timeout := config.Timeout
+				if timeout == 0 {
+					timeout = testcontext.DefaultTimeout
+				}
+				ctx := testcontext.NewWithContextAndTimeout(parent, t, timeout)
 				defer ctx.Cleanup()
 
 				planet, err := NewCustom(ctx, log, planetConfig, satelliteDB)