handle case when Patroni returns that lag is unknown (#1724)

* handle case when Patroni returns that lag is unknown
* remove some prints from e2e test

pkg/util/util.go

@@ -8,6 +8,7 @@ import (
 	"encoding/base64"
 	"encoding/hex"
 	"fmt"
+	"math"
 	"math/big"
 	"math/rand"
 	"reflect"
@@ -19,6 +20,7 @@ import (
 	"github.com/motomux/pretty"
 	resource "k8s.io/apimachinery/pkg/api/resource"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/util/intstr"
 
 	"github.com/zalando/postgres-operator/pkg/spec"
 	"golang.org/x/crypto/pbkdf2"
@@ -322,6 +324,20 @@ func testNil(values ...*int32) bool {
 	return false
 }
 
+// Convert int to IntOrString type
+func ToIntStr(val int) *intstr.IntOrString {
+	b := intstr.FromInt(val)
+	return &b
+}
+
+// Get int from IntOrString and return max int if string
+func IntFromIntStr(intOrStr intstr.IntOrString) int {
+	if intOrStr.Type == 1 {
+		return math.MaxInt
+	}
+	return intOrStr.IntValue()
+}
+
 // MaxInt32 : Return maximum of two integers provided via pointers. If one value
 // is not defined, return the other one. If both are not defined, result is also
 // undefined, caller needs to check for that.