Bug Description

The latest build of #1561 failed with the following error:

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FAIL: A general test for a PDep job in Arkane

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Traceback (most recent call last):

  File "/home/travis/build/ReactionMechanismGenerator/RMG-Py/arkane/pdepTest.py", line 104, in testPDepJob

    self.assertAlmostEquals(rxn.kinetics.getRateCoefficient(1000.0, 1.0), 88.88253229631246)

AssertionError: 88.8819863725482 != 88.88253229631246 within 7 places

This PR does not change any part of Arkane or RMG's pdep code though, and in fact this error only showed when I recently rebased this branch on current master. I notice that this test fails often when I run the functional tests locally, and it appears that the number for the rate coefficient appears to drift slightly for reasons unknown (it appears to happen whenever we add a new Arkane example or functional test, for example I believe this was why the most recent change was made to this unit test here.)

I also wonder if it is somehow related to the error with the most recent Chlorine DB branch build here, where the order of the reactants has changed when the functional tests are run in this build.

A going theory that I have is that this is related to Arkane's use of global and module variables, which might cause problems when we run all of the Arkane examples at once, but I am not sure.

In the meantime, we might want to consider re-writing this test. Thoughts?

How To Reproduce

Run the RMG functional tests locally. Check out the errorCancelingReactions branch if need be.