Merge branch '6.3.x' into release-6.4.0

Conflicts:
	bonita-migration-distrib/src/main/resources/versions/6.3.7-6.3.8/Database/001_theme/bonita-portal-theme.zip
	bonita-migration-integration-tests/build.gradle
	pom.xml
Update pom.xml

Update migration from 6.4.0 to 7.0.0
Revert "Update pom.xml"

This reverts commit d1470dd79e84ef34b35f383c0604eae49163ed1d.
complete the warning message with update of index fails
Merge branch 'release-6.3.9' into release-6.4.0

Conflicts:
	bonita-migration-distrib/src/main/groovy/org/bonitasoft/migration/versions/v6_2_6_to_6_3_0/UpdateDataMappingContraint.groovy
Merge remote-tracking branch 'origin/release-6.3.9'

Conflicts:
	bonita-migration-distrib/src/main/resources/versions/6.3.7-6.3.8/Database/001_theme/bonita-portal-theme.zip
	bonita-migration-integration-tests/build.gradle
	bonita-migration-scripts-integration-tests/src/main/groovy/org/bonitasoft/migration/postmigration/PostMigrationTest.groovy
	pom.xml
Fix version of pom in tests for 6.3.9
fix versions for db filler 6.3.9
add bonita home 6.3.9 in the folder 6.3.8-6.3.9
add migration 6.3.9-6.4.0
merge branche 'release-6.4.0' into 6.4.x
merge branch '6.4.x' into master
Merge branch 'master' into 'BS-11749_CaseVisu'