Change Mjolnir username

[amandahla]

Overview

As requested in issue #81 , this PR changes Mjolnir user to "moderator".

To take into consideration: the user created by previous versions ("mjolnir") should be manually deleted.

Rationale

Make username more approachable.

Juju Events Changes

N/A

Module Changes

N/A

Library Changes

N/A

Checklist

• The charm style guide was applied
• The contributing guide was applied
• The changes are compliant with ISD054 - Manging Charm Complexity
• The documentation is generated using src-docs
• The documentation for charmhub is updated.
• The PR is tagged with appropriate label (urgent, trivial, complex)

[arturo-seijas]

LGTM

[github-actions]

Test coverage for 25b378e

Name                            Stmts   Miss Branch BrPart  Cover   Missing
---------------------------------------------------------------------------
src/actions/__init__.py             3      0      0      0   100%
src/actions/register_user.py       22      0      2      0   100%
src/actions/reset_instance.py      21      0      2      0   100%
src/charm.py                      175      8     32      4    94%   124-125, 177-178, 197-198, 239, 253
src/charm_state.py                 64      1     12      1    97%   141
src/charm_types.py                 11      0      0      0   100%
src/database_client.py             53      1     10      3    94%   35, 47->exit, 69->exit
src/database_observer.py           54      4      6      0    93%   70-72, 88
src/exceptions.py                   4      0      0      0   100%
src/mjolnir.py                     76      8     20      2    88%   60-64, 73, 93-96
src/observability.py                9      0      0      0   100%
src/pebble.py                      77     10      6      3    84%   90-91, 93, 95, 109-114
src/saml_observer.py               45      1      8      0    98%   64
src/synapse/__init__.py             3      0      0      0   100%
src/synapse/api.py                161      2     22      2    98%   207, 376
src/synapse/workload.py           200      6     30      5    95%   361-362, 378, 427->430, 476, 478, 483
src/user.py                        24      0      4      0   100%
---------------------------------------------------------------------------
TOTAL                            1002     41    154     20    95%

Static code analysis report

Run started:2023-10-27 14:47:58.657307

Test results:
  No issues identified.

Code scanned:
  Total lines of code: 5054
  Total lines skipped (#nosec): 4
  Total potential issues skipped due to specifically being disabled (e.g., #nosec BXXX): 0

Run metrics:
  Total issues (by severity):
  	Undefined: 0
  	Low: 0
  	Medium: 0
  	High: 0
  Total issues (by confidence):
  	Undefined: 0
  	Low: 0
  	Medium: 0
  	High: 0
Files skipped (0):