band_gaps_he: preserve order of requirements in HomogenizationEngine.call()
band_gaps_he: preserve order of requirements in HomogenizationEngine.call()

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