Tagging cime_cesm2_0_rel_03

Tagging cime_cesm2_0_rel_02

First release tag

Tagging cime5.6.7

Merge pull request ESMCI#2567 from jedwards4b/smarter_xmlchange

Smarter xmlchange 
Move the flag that indicates an xml file needs to be rewritten from the case object to the individual file objects and before writing a value confirm that that value is not already the same as the file value.

Test suite: scripts_regression_tests.py (running full cesm prealpha test suite in progress)
Test baseline: cesm2_0_alpha10f
Test namelist changes: none
Test status: bit for bit
Addresses ESMCI#2448

User interface changes?:

Update gh-pages html (Y/N)?:

Code review: @jgfouca

remove cam section from config_archive.xml

forgot to push to pr 2552

Merge pull request ESMCI#2548 from jedwards4b/configure_clean_location

clean should not look for mpilibs
configure --clean shouldn't need to figure out what mpi library it needs.

Test suite: by hand configure --clean on cheyenne
Test baseline:
Test namelist changes:
Test status: [bit for bit, roundoff, climate changing]

Fixes ESMCI#2542

User interface changes?:

Update gh-pages html (Y/N)?:

Code review:mnlevy1981

Tagging cime5.6.3

Tagging cime5.6.2