[JUNIT] changed test class name

Correctly rename TestPicoAnnotationPatch so it will be run in the JUNIT
regression.

Change-Id: Ied9d6918ab4ecf8939fa2fcc0fc6ff0b4bb25245
Reviewed-on: http://saros-build.imp.fu-berlin.de/gerrit/1265
Tested-by: Jenkins CI
Reviewed-by: Stefan Rossbach <srossbach@arcor.de>