SONAR-4898 fix quality flaws
Add jacoco_build.sh
SONAR-4898 improve stability of WatcherThreadTest on slow machines
SONAR-4898 improve (again) stability of WatcherThreadTest
Merge remote-tracking branch 'origin/branch-4.5'

Conflicts:
	server/sonar-process-monitor/src/test/java/org/sonar/process/monitor/WatcherThreadTest.java