update ProblemDefinition to have hook attributes always defined
update ProblemDefinition to have hook attributes always defined

- call .setup_hooks() in .reset()

rc/sfepy,rc/sfepy,lokik/sfepy,lokik/sfepy,lokik/sfepy,BubuLK/sfepy,RexFuzzle/sfepy,vlukes/sfepy,RexFuzzle/sfepy,sfepy/sfepy,sfepy/sfepy,RexFuzzle/sfepy,rc/sfepy,vlukes/sfepy,RexFuzzle/sfepy,BubuLK/sfepy,lokik/sfepy,vlukes/sfepy,BubuLK/sfepy,sfepy/sfepy