[JENKINS-59886] Strengthen the queue to avoid canTake and canRun implementers...

[JENKINS-59886] Strengthen the queue to avoid canTake and canRun implementers hanging the queue (#4311)

* [JENKINS-59886] Strengthen the queue to avoid canTake and canRun implementers hanging it

* [JENKINS-59886] Messages on iso-8859-1

* [JENKINS-59886] Messages on iso-8859-1

* [JENKINS-59886] lower case on properties

* [JENKINS-59886] trailing empty blanks

* [JENKINS-59886] Double single-quotes

* [JENKINS-59886] Don't sleep in the loop maintaining the queue

* [JENKINS-59886] Add class suffix, wait to just the start of the build

* [JENKINS-59886] Assert clearly there is only one job in the queue

* [JENKINS-59886] Uncomment fix

* [JENKINS-59886] Remove old comment

* [JENKINS-59886] Remove log messages from property files

* [JENKINS-59886] Remove UTF8 characters from es messages