[FIXED JENKINS-33201 Java JSON exception with an empty parametrized build.] (#2444)

* Fixed JENKINS-33201 [Java JSON exception with an empty parametrized
build.]

* FIXED JENKINS-33201. Changed to FormException instead of Failure

* That fix was never in a released version.

So it cannot have been reverted.

* Lowercase i for consistency

* Remove the concept of yanking dead executors.

* Another unnecessary call to doYank.

* [FIXED JENKINS-27530] Jenkins.reload must also reload the Queue to ensure that every Queue.Item.task corresponds to a live Job, lest nextBuildNumber be bogus.

* [JENKINS-27530] Noting #2439 & #2440.

* FIXED JENKINS-33201. Changed to FormException instead of Failure

* [FIXED JENKINS-33201 .FormException is thrown if parameterDefinitions are not available .

* Changing one more Tab to Space

* Moved checkForEmptyParameters to Job class