PMM-7 use image from ENV for standalone encrypted

docker-compose.yml

@@ -278,7 +278,7 @@ services:
     standalone-encrypted:
         user: root
         container_name: "standalone-encrypted"
-        image: percona/percona-server-mongodb:5.0.13-11
+        image: ${TEST_MONGODB_IMAGE:-mongo:4.4}
         ports:
             - "${TEST_MONGODB_STANDALONE_ENCRYPTED_PORT:-27027}:27017"
         volumes:

exporter/encryption_info_test.go

@@ -17,6 +17,7 @@ package exporter
 
 import (
 	"context"
+	"fmt"
 	"io"
 	"strings"
 	"testing"
@@ -32,6 +33,10 @@ import (
 
 func TestGetEncryptionInfo(t *testing.T) {
 	t.Parallel()
+	version, vendor := getMongoDBVersionInfo(t, "standalone-encrypted")
+	if vendor != "Percona" {
+		t.Skip("Test is only for Percona MongoDB as upstream MongoDB does not support encryption")
+	}
 
 	ctx, cancel := context.WithTimeout(context.Background(), 3*time.Second)
 	defer cancel()
@@ -52,13 +57,13 @@ func TestGetEncryptionInfo(t *testing.T) {
 	c := newDiagnosticDataCollector(ctx, client, logger, true, ti, dbBuildInfo)
 
 	// The last \n at the end of this string is important
-	expected := strings.NewReader(`
+	expected := strings.NewReader(fmt.Sprintf(`
 	# HELP mongodb_security_encryption_enabled Shows that encryption is enabled
 	# TYPE mongodb_security_encryption_enabled gauge
 	mongodb_security_encryption_enabled{type="localKeyFile"} 1
 	# HELP mongodb_version_info The server version
 	# TYPE mongodb_version_info gauge
-	mongodb_version_info{edition="Community",mongodb="5.0.13-11",vendor="Percona"} 1` + "\n")
+	mongodb_version_info{edition="Community",mongodb="%s",vendor="%s"} 1`, version, vendor) + "\n")
 
 	filter := []string{
 		"mongodb_security_encryption_enabled",