added check for missing queryString for ES Core query constructor
added check for missing queryString for ES Core query constructor

igabriel85/IeAT-DICE-Repository,igabriel85/IeAT-DICE-Repository,igabriel85/DICE-Project,igabriel85/IeAT-DICE-Repository,igabriel85/DICE-Monitoring,igabriel85/DICE-Monitoring,igabriel85/DICE-Monitoring,igabriel85/DICE-Project,igabriel85/DICE-Project