removed old boost version made boost required

Gabriele Contini

2019-09-01 296baa1f2f26aa5fe711d154d557ca2a7d6f9b5d

 src/library/base/EventRegistry.cpp

@@ -79,7 +79,7 @@
}

void EventRegistry::addError(EVENT_TYPE event) {
   addEvent(event, SVRT_ERROR);
   this->addEvent(event, SVRT_ERROR);
}

void EventRegistry::addEvent(EVENT_TYPE event, SEVERITY severity) {