Add jagger-thread metric
Merge from master. Clean code
Fix NPE in WorkloadTask
Docu for success rate metric implemented
Clean code
Merge pull request #297 from dlatnikov/JFG-460_success_rate_docu

Docu for success rate metric implemented
log level of report generation is moved from INFO to DEBUG
Add comment about collector name
Merge pull request #296 from kgribov/CalculatorAggregator

Thread count feature
Merge pull request #298 from dlatnikov/JFG-443_log_level_of_report_plots

log level of report generation is moved from INFO to DEBUG
jfg-531
check null values from tables.
show "no name matrics" in pdf(summary tab with 1 sesion chosen) view.
ignore such metrics in table view.
jfg-442
give all nodes all samples at the very begining of test
[maven-release-plugin] prepare release parent-1.2.2-m9
[maven-release-plugin] prepare for next development iteration
Create db schema checker
Merge pull request #301 from amikryukov/JFG-442

jfg-442 - exact invocation fix
Merge pull request #300 from amikryukov/JFG-531

JFG-531
Rollback KeyValueStorage interface
Merge pull request #302 from kgribov/DbChecker

JFG-532
hot fix DurationLogEntry
check for no values