BS-7115 : [6.1.2] IdentityAPI getGroupByPath generate a SGroupNotFoundException

- Add migration to replace empty parent path by null
BS-7115 : [6.1.2] IdentityAPI getGroupByPath generate a SGroupNotFoundException

- Fix prob on tests with old changed method
BS-7115 : [6.1.2] IdentityAPI getGroupByPath generate a SGroupNotFoundException

- Fix prob on tests with old changed method
BS-7115 : [6.1.2] IdentityAPI getGroupByPath generate a SGroupNotFoundException

- Change previous.bonita.version in 6.3.0
BS-7115 : [6.1.2] IdentityAPI getGroupByPath generate a SGroupNotFoundException

- Fix SQL Script
BS-7115 : [6.1.2] IdentityAPI getGroupByPath generate a SGroupNotFoundException

- Fix SQL Script
BS-8390: fix and add test
Merge branch '6.3.x' into BS-8602_ProfilesImportExport

Conflicts:
	bonita-migration-db-filler-6.3.0/src/main/java/org/bonitasoft/migration/DatabaseFiller6_3_0.java
	bonita-migration-db-filler-6.3.1/pom.xml
	bonita-migration-db-filler-6.3.1/src/main/java/org/bonitasoft/migration/DatabaseChecker6_3_1.java
	pom.xml
Merge branch '6.3.x' into BS-8602_ProfilesImportExport