update homogenization engine test: check splitting/merging chunks
update homogenization engine test: check splitting/merging chunks

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