[release/public-v2.2.0] Update Jenkinsfile and Jenkins test scripts to allow the simultaneous run of all tests on all machines

[MichaelLueken]

DESCRIPTION OF CHANGES:

With the inclusion of Gaea C5 and Hercules, the Jenkins tests began failing for Gaea or Gaea C5 and Orion or Hercules. The changes in this PR will allow the Jenkins tests to successfully run on both Gaea and Gaea C5, as well as Orion and Hercules, simultaneously.

This is a copy of PR #921, but made specifically for the release/public-v2.2.0 branch.

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

TESTS CONDUCTED:

• hera.intel
• orion.intel
• hercules.intel
• gaea-c5.intel
• gaea.intel
• jet.intel
• wcoss2.intel
• NOAA Cloud (indicate which platform)
• Jenkins
• coverage test suite
• comprehensive tests (specify which if a subset was used)

CHECKLIST

• My code follows the style guidelines in the Contributor's Guide
• I have performed a self-review of my own code using the Code Reviewer's Guide
• I have commented my code, particularly in hard-to-understand areas
• My changes need updates to the documentation. I have made corresponding changes to the documentation
• My changes do not require updates to the documentation (explain).
  These changes are only to the Jenkinsfile and Jenkins test scripts. No documentation is required.
• My changes generate no new warnings
• New and existing tests pass with my changes
• Any dependent changes have been merged and published