[Bug fix] : Fixed `gsub` issue in `write.config.SIPNET`

[meetagrawal09]

Description

Fixed issues with local deployment for SIPNET model.

The variables cpruncmd and cpoutcmd were added to write.config.SIPNET to extend it for cloud based PEcAn deployment. On a local deployment setup the workflow for SIPNET model was breaking with the below error :

Error in gsub("@CPRUNCMD@", cpruncmd, jobsh) :
  invalid 'replacement' argument
Calls: <Anonymous> ... <Anonymous> -> do.call -> write.config.SIPNET -> gsub
> proc.time()
   user  system elapsed
  7.132   3.362   7.877

The error arises since local pecan.xml does not contain settings$host$rabbitmq$cpfcmd and settings$host$rabbitmq$cpfcmd which is used to set cpruncmd and cpoutcmd in the write.config.SIPNET file.

Review Time Estimate

• [ ] Immediately
• [ ] Within one week
• [X] When possible

Types of changes

• [ ] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [X] Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• [ ] My change requires a change to the documentation.
• [ ] My name is in the list of CITATION.cff
• [ ] I have updated the CHANGELOG.md.
• [ ] I have updated the documentation accordingly.
• [X] I have read the CONTRIBUTING document.
• [ ] I have added tests to cover my changes.
• [X] All new and existing tests passed.