+ monitoring ids fetching performance
+ custom metrics/validators performance
Merge branch 'master' of github.com:griddynamics/jagger into gdmaster
+ more reliable monitoring ids fetching
- delete 'distinct' witch does no effect
Merge pull request #431 from amikryukov/control-tree-creation-performance

Control tree creation performance
Merge https://github.com/griddynamics/jagger into JFG-579

Conflicts:
	webclient/src/main/java/com/griddynamics/jagger/webclient/client/SessionDataService.java
	webclient/src/main/java/com/griddynamics/jagger/webclient/client/SessionDataServiceAsync.java
	webclient/src/main/java/com/griddynamics/jagger/webclient/client/components/SessionComparisonPanel.java
	webclient/src/main/java/com/griddynamics/jagger/webclient/client/components/TagBox.java
	webclient/src/main/java/com/griddynamics/jagger/webclient/server/SessionDataServiceImpl.java