Fix user logout and update after password change

[timopollmeier]

This fixes a crash when the password is changed for a user that is not
logged and corrects the session_remove_other_sessions call to keep
the session sending the command active.
When changing the current user, the username is now also updated if
the password stays the same.

Checklist:

• Tests N/A
• CHANGES Entry

[codecov]

Codecov Report

Merging #1159 into master will decrease coverage by 0.1%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1159      +/-   ##
==========================================
- Coverage   15.38%   15.28%   -0.11%     
==========================================
  Files         867      843      -24     
  Lines       27100    27025      -75     
  Branches     5776     5770       -6     
==========================================
- Hits         4170     4131      -39     
+ Misses      21540    21494      -46     
- Partials     1390     1400      +10

Impacted Files	Coverage Δ
gsa/src/web/components/icon/trashdeleteicon.js	0% <0%> (-100%)	⬇️
gsa/src/web/utils/selectiontype.js	0% <0%> (-100%)	⬇️
gsa/src/web/components/icon/restoreicon.js	0% <0%> (-100%)	⬇️
gsa/src/web/components/icon/deleteicon.js	0% <0%> (-75%)	⬇️
gsa/src/web/components/icon/exporticon.js	0% <0%> (-75%)	⬇️
gsa/src/web/components/icon/trashicon.js	0% <0%> (-75%)	⬇️
gsa/src/web/components/pagination/pagination.js	0% <0%> (ø)	⬆️
gsa/src/web/pages/filters/listpage.js	0% <0%> (ø)	⬆️
...b/components/dashboard/display/datadisplayicons.js	0% <0%> (ø)	⬆️
gsa/src/web/pages/results/detailspage.js	0% <0%> (ø)	⬆️
... and 77 more

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[bjoernricks]

Thanks a lot!