Val-2c should perform consistently with 1 or 2 processors.

[simopier]

Reason

Validation case val-2c currently provides slightly different results when using 1 vs 2 processors, when it should provide the same results.

This issue arises later in the simulation close to steady state when concentrations are very small, which makes it acceptable for now, but this is an issue that should be addressed.

Currently, the tests are only run on 1 processor with max_parallel = 1 and this should be removed once this issue is fixed.

Design

• Figure out the source of these differences
• Fix it
• remove max_parallel = 1 from val-2c/tests

Impact

More consistent parrallel capabilities.