fix: Fix name of isonet if network name contains underscore

Upstream PR kubernetes-sigs#361

Author: hrak

controllers/utils/isolated_network.go

@@ -18,14 +18,18 @@ package utils
 
 import (
 	"fmt"
+	"regexp"
 	"strings"
 
 	infrav1 "sigs.k8s.io/cluster-api-provider-cloudstack/api/v1beta3"
 	ctrl "sigs.k8s.io/controller-runtime"
 )
 
+var metaNameRegex = regexp.MustCompile(`[^a-z0-9-]+`)
+
 func (r *ReconciliationRunner) IsoNetMetaName(name string) string {
-	return fmt.Sprintf("%s-%s", r.CSCluster.Name, strings.ToLower(name))
+	str := metaNameRegex.ReplaceAllString(fmt.Sprintf("%s-%s", r.CSCluster.Name, strings.ToLower(name)), "-")
+	return strings.TrimSuffix(str, "-")
 }
 
 // GenerateIsolatedNetwork of the passed name that's owned by the ReconciliationSubject.