java.lang.NullPointerException: null
	at hudson.model.AbstractBuild.setWorkspace(AbstractBuild.java:296)
	at hudson.model.ProjectTest.testCheckout(ProjectTest.java:423)

If we are running on a case-insensitive FS, the test makes no sense because migration would never even be attempted to begin with.

(cherry picked from commit 286337ea)

Adapted from #1375 by @daniel-beck: omitting change to User construction, and adding test.
(cherry picked from commit 088edabb)

Conflicts:
	changelog.html

Adapted from #1375 by @daniel-beck: omitting change to User construction, and adding test.

f43a450c addendum: during migration, if nothing else is being fingerprinted besides archived artifacts, then there is no reason to keep the separate fingerprint publisher at all.

For regular test failures this is normally just annoying noise.