Test cases: 'unknownClass', 'nullClass' and 'classWithKnownAttributesAndWithoutConfiguration' for Instance. Adding the validation AttributeValue in InstanceHelper
fixing the assertion default name for instance tests
Implementation of ServiceFactory
Fixing the name of the methods for obtaining instances in ServiceFactory
Test cases: 'unknownClass', 'nullClass' and 'classWithKnownAttributesAndWithoutConfiguration' for Instance. Adding the validation AttributeValue in InstanceHelper
fixing the assertion default name for instance tests
fixing the assertion default name for instance tests
Implementation of tests involving instances and configuration of attributes
Fixing the refactorings needed for merge #52
Implementation of ServiceFactory
Fixing the name of the methods for obtaining instances in ServiceFactory
fixing the assertion default name for instance tests
Implementation that validates tests Instance considered that valid configurations for attributes of the types TEXT, INTEGER and LONGTEXT