* origin/branch-5.2:
fix reset of TreeRootHolderRule + reduce duplication
reduce polling time of Compute Engine scheduler from 10s to 2
add name to thread used by NotificationService
fix duplicated SqlSessionFactory in memory
minor fix in MutableAnalysisMetadataHolder#setAnalysisDate javadoc
do not reload profile details when selecting a project, fix tooltips
improve readability of language selection on the profiles page
fix capitalization inconsistency of the notification dispatcher names
fix error in JsonWriter usage description in javadoc of WebService