Updated version of hadoop-core
For solve some problems with append method in hadoop file system
JFG-294
jagger may skip tests in case of long response from agent

Added check for status of monitoring. Because if monitoring is failed, StopMonitoring may cause deadlock.
JFG-295
wrong Success Rate calculation

Increased number of signs after comma in successrate calculation
Added support of the session status in the XML report for Jenkins plugin
Refactored XMLReporter
Merge pull request #63 from nmusienko/master

Some fixes