[#1574] ape: Introduce Properties() method for Request and Resource

* Both methods are helpers only, they are not required for interface
  implementation.

Signed-off-by: Airat Arifullin <a.arifullin@yadro.com>

pkg/ape/request/request.go

@@ -32,6 +32,10 @@ func (r Request) Resource() aperesource.Resource {
 	return r.resource
 }
 
+func (r Request) Properties() map[string]string {
+	return r.properties
+}
+
 type Resource struct {
 	name       string
 	properties map[string]string
@@ -53,3 +57,7 @@ func (r Resource) Name() string {
 func (r Resource) Property(key string) string {
 	return r.properties[key]
 }
+
+func (r Resource) Properties() map[string]string {
+	return r.properties
+}