Minor javadoc additions.
Revert "[JENKINS-15630] Build using Coverity Plugin fails because /tmp/.covlk file exists (Multiple jobs on executor)"

This reverts commit 93b65fe7f0536abd435af745bafc08ffe5c82464.
Add an option to skip fetching defects at the end of a build.
Add an option to override the SA location for a job.
Merge https://github.com/jenkinsci/coverity-plugin

Conflicts:
	src/main/java/jenkins/plugins/coverity/CoverityPublisher.java
	src/main/java/jenkins/plugins/coverity/InvocationAssistance.java