security: Enable load of ValidatorConf from a boost::property_tree section

The functionality was already there, but was marked private.
This commit makes this function a public interface of ValidatorConf.

Change-Id: I5de598bc43949685963bff979959775733c3a639
diff --git a/src/security/validator-config.hpp b/src/security/validator-config.hpp
index acc85f5..feea4bf 100644
--- a/src/security/validator-config.hpp
+++ b/src/security/validator-config.hpp
@@ -47,6 +47,10 @@
   void
   load(std::istream& input, const std::string& filename);
 
+  void
+  load(const security::conf::ConfigSection& configSection,
+       const std::string& filename);
+
 protected:
   virtual void
   checkPolicy(const Data& data,
@@ -87,10 +91,6 @@
                const OnFailed& onValidationFailed);
 
   void
-  process(const security::conf::ConfigSection& configSection,
-          const std::string& filename);
-
-  void
   onConfigRule(const security::conf::ConfigSection& section,
                const std::string& filename);