[Test] Fix memory leaks in CtiConversionTest and ChemkinConversionTest
[Test] Fix memory leaks in CtiConversionTest and ChemkinConversionTest

imitrichev/cantera,Heathckliff/cantera,imitrichev/cantera,Heathckliff/cantera,imitrichev/cantera,Heathckliff/cantera,imitrichev/cantera,Heathckliff/cantera,Heathckliff/cantera,imitrichev/cantera,Heathckliff/cantera,imitrichev/cantera