lkairies-libxtreemfs_daemon_threads-review/contrib,server: Added option in libxtreemfs client and volume to start threads as daemons and extended the XtreemFSHadoopClient to use clients and volumes with daemon threads
lkairies-libxtreemfs_daemon_threads-review/contrib, foundation: Fixed IndexOutOfBoundException in XtreemFSHadoopClient and added missing constructor to RPCNIOSocketClient.
lkairies-user_guide_hadoop_integration_description/doc: Changed description of read-/write buffer and client-/group ID.
servers: Upgraded JUnit binary from 4.3.1 to 4.11 and updated all references.
servers: MetadataCacheTest: Fixed errors after upgrade to JUnit 4.11.
servers: OSD Webserver: Increased time to wait for a blocked port to 180 seconds. Improved error message which shows the port in use now.
servers: ReplicationTest: Let each test print its name at the beginning to further debug the "Address already in use" problem.
servers: Added missing JUnit dependency hamcrest-core-1.3.jar.
lkairies-user_guide_hadoop_integration_description/doc: Corrected typo in Hadoop description.
servers: TestEnvironment: In case of errors during start(), shutdown all servers which were already started.

If the error was "Address already in use", also dump the remaining threads after the shutdown.
servers: TestEnvironment: Fixed NullPointerException when a start() failed and shutdown() tries to stop OSDs which were not started.