Add: Remote link: Application

[IncandescentChrysalis]

Fixes #1448

Adding a link to an application connected with a Jira instance through the /rest/api/2/issue/{issueIdOrKey}/remotelink Jira API route, an application section might be provided.
This might for instance be used to add Confluence links to a connected Confluence instance.
Cf. Atlassian knowledge base about the different kind of links.

This PR add an application parameter to the create_or_update_issue_remote_links function.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 2 lines in your changes missing coverage. Please review.

Project coverage is 31.73%. Comparing base (42ed0b0) to head (9d5fd0a).

Files	Patch %	Lines
atlassian/jira.py	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1429      +/-   ##
==========================================
- Coverage   34.38%   31.73%   -2.65%     
==========================================
  Files          46       46              
  Lines        8586     8258     -328     
  Branches     1601     1296     -305     
==========================================
- Hits         2952     2621     -331     
- Misses       5511     5521      +10     
+ Partials      123      116       -7     

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[IncandescentChrysalis]

@gonchik I added a test case 2 weeks ago, but it seems the second attempt seems not to have run the actual checks, as there is not output nor logs.
Has the waiting period expired on those checks?

[gonchik]

Thanks @IncandescentChrysalis
let me merge and do local tests

[gonchik]

@IncandescentChrysalis as I see issue with tests, could you double check the tests please?