fix tests in error

fix:
{code}
Tests in error: 
  initializationError(InjectedTest): com.sun.jna.Native.open(Ljava/lang/String;)J
  initializationError(hudson.plugins.performance.PerformancePublisherTest): org.jvnet.hudson.test.HudsonTestCase
{code}
Cache preprocessed JMeter Reports (JENKINS-9031)

Instead of parsing all available JTL results upon each request,
we now save the parsed report as a serialized Java object for later
reuse. The file will be next to the JTL file with a '.serialized'
suffix. Additionally the report also gets added to a in-memory cache
with a maximum capacity of 100 reports. This considerably speeds up the
performance trend display.

Signed-off-by: Michel Marti <mma@objectxp.com>
Change version