Enhance TDT feature retrieval by allowing regex matching

In order to allow exact matching, replace the approximate, default and impossible to turn
off matching with more precise regex matching so that either exact, or approximate matches
me used as the developer wishes

Trigger/TrigSteer/TrigCompositeUtils/TrigCompositeUtils/TrigCompositeUtils.icc

@@ -3,6 +3,7 @@
 */
 
 #include "AsgMessaging/MessageCheck.h"
+#include <regex>
 
 namespace TrigCompositeUtils {
 
@@ -139,7 +140,18 @@ namespace TrigCompositeUtils {
       return;
     }
     auto it = std::remove_if(vector.begin(), vector.end(), [&](const ElementLink<CONTAINER>& el) {
-      return (el.dataID().find(containerSGKey) == std::string::npos);
+
+	bool oldmatch = ( el.dataID().find(containerSGKey) == std::string::npos);
+	
+	bool newmatch = !std::regex_match( el.dataID(), std::regex(containerSGKey) );
+		
+	// ANA_MSG_WARNING ( "Strict match violation" << el.dataID() << " : " << containerSGKey ); 
+
+	if ( oldmatch!=newmatch ) std::cerr << "SUTT:: Strict match violation" << el.dataID() << " : " << containerSGKey << std::endl;; 
+				  
+	return  !std::regex_match( el.dataID(), std::regex(containerSGKey) );
+      
+        // return (el.dataID().find(containerSGKey) == std::string::npos);
     });
     // Collection has been re-ordered to put the bad elements at the end
     vector.erase(it, vector.end());