[JENKINS-45256] The reload-configuration CLI command ought to wait until the reload is finished

(cherry picked from commit cc1615b9)

* [JENKINS-42707] AccessDeniedException vulnerability in ReverseBuildTrigger.

* [JENKINS-42707] Added tests to expose the issue

* [JENKINS-42707] Log message according to permission (DISCOVER/READ)

* [JENKINS-42707] Use MockAuthorizationStrategy

* [JENKINS-42707] Remove internationalization for logger

* [JENKINS-42728] Updating view with CLI using different view type should fail

- Additionally, updating a view using an XML that will be converted by XStream via an alias
  will succeed.

[FIXES JENKINS-42728]

* Remove TestView

* update test

This reverts commit 7fe3a4a3.

* Do not load detached plugins during tests.
Also warn about plugins which force us to create classes.jar.

* Porting POM fix from #2795: we must allow snapshots from repo.jenkins-ci.org so as to be able to test upstream component PRs.

* Fixed failures in tests which assumed detached plugins were being loaded.

* jenkins-test-harness 2.20

* Unreproducible test failure on CI, probably due to timing.

Avoids creating unversioned file test/0/build.xml.

[JENKINS-42717] - Prevent NPE when a non-existent Default View is specified in the global config (#2815)

* [JENKINS-42717] - Document view management methods in Jenkins and ViewGroupMixIn

* [KENKINS-42717] - GlobalDefauldViewConfiguration should not fail with NPE when the view is missing

* [JENKINS-42717] - Draft the direct unit test

* [JENKINS-42717] - Fix the tes implementation

* [JENKINS-42717] - Make FormException localizable

* [JENKINS-42717] - Fix te build glitch

(cherry picked from commit 72901698)

[FIXED JENKINS-35160] - Job deletion: Wait up to 15 seconds for interrupted builds to complete (#2789)

* [FIXED JENKINS-35160] Wait up to 15 seconds for interrupted builds to complete

- Also now aware of concurrent builds

* [JENKINS-35160] Tests are good, they catch bugs

* [JENKINS-35160] We should do the interrupt for any Item not just Jobs

* [JENKINS-35160] s/DeleteBlocker/ItemDeletion/g

Left over references before I settled on a better name

* [JENKINS-35160] Switch to Failure for better HTML rendering

* [JENKINS-35160] Align the i18n key with owning class

Previously, when the 2nd `e.click()` is called, the page has already transitioned to another page, so the anchor objects have become invalid.

HtmlUnit somehow still manages to follow a link, except when there's some JavaScript attached to the onclick() handler it's going to execute in a strange environment. Some management link requires a POST, and that was done via JavaScript. So that broke the test.