JFG-737
Merge https://github.com/griddynamics/jagger into JFG-738

Conflicts:
	dbapi/src/main/java/com/griddynamics/jagger/dbapi/DatabaseServiceImpl.java
JFG-738
session scope plots have been added to the webUI
with follow features:

-Tests are sorted by startime
-Pause between end of previous test and next test also considered
Merge branch 'JFG_780_test_summary_in_PDF_via_dbservice' of https://github.com/dlatnikov/jagger into JFG-738_new
negative metrics are correctly displayed now
Merge branch 'grid_master' into JFG_772_negative_values_in_plots
TestInfoDTO was expanded with endTime and moved to FetchUtil
Unchecked session scope plots are fixed
TaskDataDto has ids and sessionIds connected now
decision based on limits is using only matched baseline now
New hierarchy was realesed. Duplicate code was deleted.
merge with master
added some comments
added plot headers
Merge https://github.com/griddynamics/jagger into JFG-738
Deleted SessionScopeDataUtil
deleted unused "imports"
merge with master
Merge pull request #530 from dlatnikov/JFG_772_negative_values_in_plots

Jfg 772 negative values in plots
changes after review