Fixes #3948 : Add Warning when there is no group/directive linked to a
Rule
Merge pull request #319 from VinceMacBuche/ust_3937/implem_3948/add_warning_rule_no_group_directive

Fixes #3937 : Add Warning when there is no group/directive linked to a Rule
Fixes #3967 : Improve change request merge check:

Ldap datas are transformed in XML, then checked, before being
unserialised to their types
Merge pull request #326 from VinceMacBuche/bug_3967/serialize_deserialize_ldap_into_xmll

Fixes #3967 : Improve change request merge check:
Merge branch 'branches/rudder/2.6' into branches/rudder/2.7

Conflicts:
	rudder-core/src/main/scala/com/normation/rudder/services/workflows/CommitAndDeployChangeRequestService.scala
Merge branch 'branches/rudder/2.7'
Change version of pom.xml to 2.4.10-SNAPSHOT
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 2.6.7-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 2.7.4-SNAPSHOT
Merge branch 'branches/rudder/2.7'

Conflicts:
	pom.xml
	rudder-core/pom.xml
	rudder-web/pom.xml
Change version of pom.xml to 2.4.11-SNAPSHOT
Change version of pom.xml to 2.6.8-SNAPSHOT
Change version of pom.xml to 2.7.5-SNAPSHOT
Fixes #3978 : Add debug log for change request
Merge pull request #327 from VinceMacBuche/bug_3977/implem_3978/add_debug_log

Refs #3977 : Add debug log for change request
Merge branch 'branches/rudder/2.4' into branches/rudder/2.6

Conflicts:
	pom.xml
	rudder-core/pom.xml
	rudder-web/pom.xml
Merge branch 'branches/rudder/2.6' into branches/rudder/2.7

Conflicts:
	pom.xml
	rudder-core/pom.xml
	rudder-web/pom.xml
Merge branch 'branches/rudder/2.7'

Conflicts:
	pom.xml
	rudder-core/pom.xml
	rudder-web/pom.xml