Improve Archive Error Message

Hello @dbeltran, @bdepaula, and @isimomun

Autosubmit Version

3.15.15, but probably all.

Expid affected

a7dc a773 a75j a6zs a74v a74r

Summary

Autosubmit throws a random error upon failing to archive due to unpushed changes to the project folder.

Steps to reproduce

1. Create an experiment with project type git,
2. make changes on the experiment's project folder located at Autosubmit's local folder (i.e. /esarchive/autosubmit) path (according to .autosubmitrc).
3. execute autosubmit archive expid

What is the current bug behavior?

Autosubmit is running with 3.15.15

Checking configuration files...
expdef_a773.conf OK
platforms_a773.conf OK
jobs_a773.conf OK
wrappers OK
autosubmit_a773.conf OK
Configuration files OK

Registering commit SHA...
Cleaning GIT directory...
Changes not committed detected... SKIPPING!
[ERROR] Trace: 'AutosubmitCritical' object has no attribute 'messagee'
Traceback (most recent call last):
  File "/shared/earth/software/autosubmit/3.15.15-foss-2015a-Python-2.7.9/lib/python2.7/site-packages/autosubmit-3.15.15-py2.7.egg/EGG-INFO/scripts/autosubmit", line 37, in main
    Autosubmit.parse_args()
  File "/shared/earth/software/autosubmit/3.15.15-foss-2015a-Python-2.7.9/lib/python2.7/site-packages/autosubmit-3.15.15-py2.7.egg/autosubmit/autosubmit.py", line 670, in parse_args
    return Autosubmit.archive(args.expid, noclean=args.noclean, uncompress=args.uncompress)
  File "/shared/earth/software/autosubmit/3.15.15-foss-2015a-Python-2.7.9/lib/python2.7/site-packages/autosubmit-3.15.15-py2.7.egg/autosubmit/autosubmit.py", line 4192, in archive
    if version is not None and version.startswith('3') and not Autosubmit.clean(expid, True, True, True):
  File "/shared/earth/software/autosubmit/3.15.15-foss-2015a-Python-2.7.9/lib/python2.7/site-packages/autosubmit-3.15.15-py2.7.egg/autosubmit/autosubmit.py", line 2783, in clean
    e.messagee)
AttributeError: 'AutosubmitCritical' object has no attribute 'messagee'
 [CRITICAL] None'AutosubmitCritical' object has no attribute 'messagee'
Unhandled error: If you see this message, please report it in Autosubmit's GitLab project

What is the expected correct behavior?

Something along the lines of

Autosubmit is running with 3.15.15

Checking configuration files...
expdef_a773.conf OK
platforms_a773.conf OK
jobs_a773.conf OK
wrappers OK
autosubmit_a773.conf OK
Configuration files OK

Registering commit SHA...
Cleaning GIT directory...
[CRITICAL] Cannot archive an experiment with unpushed local changes to the project folder.