Replace the server's ConfigurationMock by the SDK's

Jean-Noël Rouvignac

21.16.2016 e69a46e663778a1c68fc9059e1424089ddcc0eaa

opendj-server-legacy/src/test/java/org/opends/server/ConfigurationMock.java does not exist in tree 7b153cd8411f7552d31178b3b15eb00a2fe25961