fix(schema): Use ingress default values

Ingress has some default values, like path and classname. We need to
ensure that values are taken or nil, and to apply them if they are not
set explicitally. Port is a sepcial case.

generator/ingress.go

@@ -51,9 +51,9 @@ func NewIngress(service types.ServiceConfig, Chart *HelmChart) *Ingress {
 
 	Chart.Values[service.Name].(*Value).Ingress = &IngressValue{
 		Enabled:     mapping.Enabled,
-		Path:        mapping.Path,
+		Path:        *mapping.Path,
 		Host:        mapping.Hostname,
-		Class:       mapping.Class,
+		Class:       *mapping.Class,
 		Annotations: mapping.Annotations,
 		TLS:         TLS{Enabled: mapping.TLS.Enabled},
 	}