SONAR-5758 db migration to delete corrupted rows in ACTIVITIES
Merge remote-tracking branch 'remotes/origin/branch-4.5'

Conflicts:
	server/sonar-server/src/main/java/org/sonar/server/db/migrations/DatabaseMigrations.java
	sonar-core/src/main/java/org/sonar/core/persistence/DatabaseVersion.java
	sonar-core/src/main/resources/org/sonar/core/persistence/rows-h2.sql