added identifier

git-svn-id: https://se1.informatik.uni-wuerzburg.de/usvn/svn/code/DMM/trunk@16146 9e42b895-fcda-4063-8a3b-11be15eb1bbd

Examples/BlueYonder_Case_Study/multiple_customers/by-multiple_customers.pdr

 <?xml version="1.0" encoding="ASCII"?>
-<repository:ObservationRepository xmi:version="2.0" xmlns:xmi="http://www.omg.org/XMI" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:domain="http://descartes.ipd.kit.edu/ql/models/mapping/domain/1.0" xmlns:repository="http://descartes.ipd.kit.edu/ql/models/repository/repository/1.0" startTimestamp="2013-06-26T15:00:0.000+0200" latestObservation="//@observations.0" latestImpact="//@impacts.0">
+<repository:ObservationRepository xmi:version="2.0" xmlns:xmi="http://www.omg.org/XMI" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:domain="http://descartes.ipd.kit.edu/ql/models/mapping/domain/1.0" xmlns:repository="http://descartes.ipd.kit.edu/ql/models/repository/repository/1.0" identifier="Blue Yonder Multiple Customers Performance Results" startTimestamp="2013-06-26T15:00:0.000+0200" latestObservation="//@observations.0" latestImpact="//@impacts.0">
   <impacts identifier="Impact1" timestamp="2013-06-07T15:04:17.663+0200" before="//@observations.0" after="//@observations.1"/>
   <impacts identifier="Impact2" timestamp="2013-06-07T15:04:17.663+0200" before="//@observations.1" after="//@observations.2"/>
   <impacts identifier="Impact3" timestamp="2013-06-07T15:04:17.663+0200" before="//@observations.2" after="//@observations.3"/>