cime stream xml modifications now made from user_nl_xxx_streams files

[mvertens]

Description of changes

cime stream xml modifications now made from user_nl_xxx_streams files

Specific notes

This PR changes modifications to stream xml files only through modifying new user_nl_xxx_stream files in the user's CASEROOT directory.

Contributors other than yourself, if any: @jedwards4b @ekluzek

CMEPS Issues Fixed: #76 #79

Are there dependencies on other component PRs

• CIME (CIME PR #4074)
• CMEPS (list)

Are changes expected to change answers?

• bit for bit
• different at roundoff level
• more substantial

Any User Interface Changes (namelist or namelist defaults changes)?

• Yes - xml stream files can now be modified from user_nl_xxx_streams where xxx =[atm,ice,ocn,lnd,rof,wav]
• No

Testing performed:

• (required) aux_cdeps
  • machines and compilers: intel/cheyenne
  • details (e.g. failed tests): compared to cdeps0.12.18 and generated cdeps0.12.22
• (optional) CESM prealpha test
  • machines and compilers
  • details (e.g. failed tests):

Hashes used for testing:

• CIME
  • repository to check out: https://github.com/mvertens/CESM.git
  • branch: feature/new_userstream_file
  • hash:
• CMEPS
  • repository to check out: https://github.com/ESCOMP/CESM.git
  • branch:
  • hash:
• CESM
  • repository to check out: https://github.com/ESCOMP/CESM.git
  • branch:
  • hash:

[jedwards4b]

If this change to compname makes this subroutine generic perhaps we should move it to a shared location and remove it from individual components?

[uturuncoglu]

@mvertens Let me try to run at least one data configuration under HAFS to see what happens. I am not expecting any issue but it would be nice to test it an any case.