Fixes #3687: Check if the version exists before trying to use it
Change version of pom.xml to 2.4.13-SNAPSHOT
Fixes #3687: Check if the version exists before trying to use it
Merge pull request #371 from fanf/bug_3687/NoSuchElementError_exception_deleted_technique_version

Fixes #3687: Check if the version exists before trying to use it, display an error otherwise
Merge branch 'branches/rudder/2.4' into branches/rudder/2.6

Conflicts:
	pom.xml
	rudder-core/pom.xml
	rudder-web/pom.xml
Change version of pom.xml to 2.6.10-SNAPSHOT
Merge branch 'branches/rudder/2.6' into branches/rudder/2.7

Conflicts:
	pom.xml
	rudder-core/pom.xml
	rudder-web/pom.xml
Change version of pom.xml to 2.7.7-SNAPSHOT
Merge branch 'branches/rudder/2.7' into branches/rudder/2.8

Conflicts:
	pom.xml
	rudder-core/pom.xml
	rudder-web/pom.xml
	rudder-web/src/main/scala/com/normation/rudder/web/snippet/configuration/DirectiveManagement.scala