Enhance exception throwing with Boost Exception library

Change-Id: I471023fc23ffaebe04d9668426b4c1b03e4919aa
Refs: #2541
diff --git a/rib/remote-registrator.cpp b/rib/remote-registrator.cpp
index aa45269..d33ba1b 100644
--- a/rib/remote-registrator.cpp
+++ b/rib/remote-registrator.cpp
@@ -90,8 +90,8 @@
         }
       else
         {
-          throw ConfigFile::Error("Unrecognized option \"" + i.first +
-                                  "\" in \"remote-registrator\" section");
+          BOOST_THROW_EXCEPTION(ConfigFile::Error("Unrecognized option \"" + i.first +
+                                                  "\" in \"remote-registrator\" section"));
         }
     }