Add more iteration in ForwardChainerUTest::test_do_chain_animals
Add more iteration in ForwardChainerUTest::test_do_chain_animals

to fail less often.

inflector/atomspace,rTreutlein/atomspace,misgeatgit/atomspace,misgeatgit/atomspace,inflector/atomspace,AmeBel/atomspace,misgeatgit/atomspace,rTreutlein/atomspace,misgeatgit/atomspace,AmeBel/atomspace,AmeBel/atomspace,inflector/atomspace,rTreutlein/atomspace,rTreutlein/atomspace,inflector/atomspace,rTreutlein/atomspace,misgeatgit/atomspace,AmeBel/atomspace,inflector/atomspace,AmeBel/atomspace