JIRA Integration Password not well encoded

Summary

Enable JIRA Integration, but the error

We tried to send a request to the provided URL but an error occured occurred.

Steps to reproduce

Fill in the JIRA Integration fields and choose a password with special characters like áöß/.@#$%%^&*

What is the current bug behavior?

No request can be send to JIRA and in the logs an "Unauthorized" appears

What is the expected correct behavior?

Password with special characters should work

Relevant logs and/or screenshots

gitlab_1  | ==> /var/log/gitlab/gitlab-rails/production.log <==
gitlab_1  | JiraService Send message ERROR: https://<URL>.atlassian.net - Unauthorized
gitlab_1  | Redirected to https://<URL>/hechi/testRepo/services/jira/edit
gitlab_1  | Completed 302 Found in 2278ms (ActiveRecord: 6.2ms)

Results of GitLab environment info

Expand for output related to GitLab environment info

System information
System:
Current User:   git
Using RVM:      no
Ruby Version:   2.3.3p222
Gem Version:    2.6.6
Bundler Version:1.13.7
Rake Version:   10.5.0
Redis Version:  3.2.5
Git Version:    2.11.1
Sidekiq Version:4.2.7
GitLab information
Version:        9.1.4
Revision:       fed799a
Directory:      /opt/gitlab/embedded/service/gitlab-rails
DB Adapter:     postgresql
URL:            https://
HTTP Clone URL: https:///some-group/some-project.git
SSH Clone URL:  ssh://git@/some-group/some-project.git
Using LDAP:     yes
Using Omniauth: no
GitLab Shell
Version:        5.0.2
Repository storage paths:

• default: /var/opt/gitlab/git-data/repositories Hooks: /opt/gitlab/embedded/service/gitlab-shell/hooks Git: /opt/gitlab/embedded/bin/git

Results of GitLab application Check

Expand for output related to the GitLab application check

Checking GitLab Shell ...
GitLab Shell version >= 5.0.2 ? ... OK (5.0.2)
Repo base directory exists?
default... yes
Repo storage directories are symlinks?
default... no
Repo paths owned by git:git?
default... yes
Repo paths access is drwxrws---?
default... yes
hooks directories in repos are links: ...
3/1 ... ok
5/3 ... ok
6/5 ... repository is empty
6/6 ... ok
6/7 ... repository is empty
2/8 ... ok
5/9 ... repository is empty
3/10 ... ok
3/11 ... repository is empty
2/12 ... repository is empty
Running /opt/gitlab/embedded/service/gitlab-shell/bin/check
Check GitLab API access: OK
Access to /var/opt/gitlab/.ssh/authorized_keys: OK
Send ping to redis server: OK
gitlab-shell self-check successful
Checking GitLab Shell ... Finished
Checking Sidekiq ...
Running? ... yes
Number of Sidekiq processes ... 1
Checking Sidekiq ... Finished
Checking Reply by email ...
Reply by email is disabled in config/gitlab.yml
Checking Reply by email ... Finished
Checking LDAP ...
Server: ldapmain
LDAP authentication... Success
LDAP users with access to your GitLab server (only showing the first 100 results)

Checking LDAP ... Finished
Checking GitLab ...
Git configured with autocrlf=input? ... yes
Database config exists? ... yes
All migrations up? ... yes
Database contains orphaned GroupMembers? ... no
GitLab config exists? ... yes
GitLab config outdated? ... no
Log directory writable? ... yes
Tmp directory writable? ... yes
Uploads directory setup correctly? ... no
Try fixing it:
sudo chown -R git /var/opt/gitlab/gitlab-rails/uploads
sudo find /var/opt/gitlab/gitlab-rails/uploads -type f -exec chmod 0644 {} ;
sudo find /var/opt/gitlab/gitlab-rails/uploads -type d -not -path /var/opt/gitlab/gitlab-rails/uploads -exec chmod 0700 {} ;
For more information see:
doc/install/installation.md in section "GitLab"
Please fix the error above and rerun the checks.
Init script exists? ... skipped (omnibus-gitlab has no init script)
Init script up-to-date? ... skipped (omnibus-gitlab has no init script)
projects have namespace: ...
3/1 ... yes
5/3 ... yes
6/5 ... yes
6/6 ... yes
6/7 ... yes
2/8 ... yes
5/9 ... yes
3/10 ... yes
3/11 ... yes
2/12 ... yes
Redis version >= 2.8.0? ... yes
Ruby version >= 2.1.0 ? ... yes (2.3.3)
Your git bin path is "/opt/gitlab/embedded/bin/git"
Git version >= 2.7.3 ? ... yes (2.11.1)
Active users: 5
Checking GitLab ... Finished

Possible fixes

Encoding of the Password field is wrong or the call to the JIRA instance is wrong encoded.

Could be done within the issues https://gitlab.com/gitlab-org/gitlab-ce/issues/31510 and https://gitlab.com/gitlab-org/gitlab-ce/issues/12746