Specify vapor phase counterpart for two CRACMM2 secondary organic aerosol species to avoid ISAM error

[bnmurphy]

Description
The CMAQ aerosol module has access to metadata and properties for each aerosol chemical species that impact their behavior and, in some cases, govern how CMAQ algorithms will process each species. Most of these properties are stored in the array structure named 'aerolist' in the AERO_DATA module.

For example, the 'voltype' field stores a three-letter abbreviation which specifies the type of partitioning each chemical species undergoes. Options are 'IRV' for irreversible one-way condensation (e.g. sulfate), 'REV' for reversible, two-way gas-particle partitioning, and 'NVL' for nonvolatile species having no gas-phase counterpart.

For species designated as 'IRV' or 'REV', the fields labeled 'gasname' and 'ctrname' are provided to explicitly link those aerosol species to their gas-phase counterpart species. These fields are primarily used for the ISAM aerosol source apportionment algorithms. One or both of these fields must be populated if the chemical species is used in an ISAM simulation, or the model will crash.

In the current released CMAQv5.5 code, these fields are missing for two species used by the CRACMM2 mechanism. The species 'ATRPN' should have 'TRPN' specified under 'gasname' and the species 'AHONIT' should have 'HONIT' specified under the 'gasname' field.

Scope and Impact
Without this fix, CMAQ will crash when running ISAM with the CRACMM2 mechanism.