Updating restart test cases for preconditioning (#175)

* updating multizone species transport

* updating restart cases

* updating disc_adj_heat sol

* updating of_grad.csv.ref

* updating solution_flow.dat custom_source_buoyancy

* updating solution pywrapper zimont

---------

Co-authored-by: Cristopher-Morales <c.l.morales.ubal@tue.nl>

Author: Cristopher-Morales

disc_adj_heat/solution_flow.dat

@@ -1,11 +1,11 @@
 CUSTOM_OBJFUNC gradient 
--0.0007539647597324534
--0.0002277272617548791
--4.565453966659134e-05
-3.810495578213702e-05
-8.215230905814446e-05
--0.0007539647597324707
--0.0002277272617548852
--4.565453966659252e-05
-3.810495578213849e-05
-8.215230905814748e-05
+-0.0007522701268875545
+-0.0002269240547655443
+-4.529033978571145e-05
+3.826150787885616e-05
+8.220634161552502e-05
+-0.0007522701268875717
+-0.0002269240547655505
+-4.529033978571262e-05
+3.826150787885762e-05
+8.220634161552804e-05