Fixes #3709: make package delete work on CentOS/Red Hat systems
Merge pull request #144 from jooooooon/bug_3709/fix_package_delete_on_redhat_systems

Fixes #3709: make package delete work on CentOS/Red Hat systems
Merge branch 'branches/rudder/2.4' into branches/rudder/2.5
Merge branch 'branches/rudder/2.5' into branches/rudder/2.6

Conflicts:
	initial-promises/node-server/common/1.0/cfengine_stdlib.cf
	initial-promises/node-server/common/1.0/rudder_lib.cf
	initial-promises/rootServerInitialPromises/cfengine-nova/common/cfengine_stdlib.cf
	techniques/applications/rpmPackageInstallation/1.0/rpmPackageInstallation.st
	techniques/applications/rpmPackageInstallation/2.0/rpmPackageInstallation.st
	techniques/applications/rpmPackageInstallation/2.1/rpmPackageInstallation.st
	techniques/applications/rpmPackageInstallation/2.2/rpmPackageInstallation.st
	techniques/system/common/1.0/cfengine_stdlib.st
	techniques/system/common/1.0/rudder_lib.st