Clean up BuildFiles under Configuration/

Clean up BuildFile.xml filea with `xmllint --format`.

Configuration/DataProcessing/test/BuildFile.xml

@@ -1,5 +1,4 @@
-<use   name="FWCore/Utilities"/>
-
+<use name="FWCore/Utilities"/>
 <bin name="TestConfigDP" file="TestCfg.cpp">
   <flags TEST_RUNNER_ARGS=" /bin/bash Configuration/DataProcessing/test run_CfgTest.sh"/>
 </bin>

Configuration/Skimming/BuildFile.xml

@@ -1,18 +1,18 @@
-<use   name="FWCore/Framework"/>
-<use   name="FWCore/PluginManager"/>
-<use   name="FWCore/ParameterSet"/>
-<use   name="FWCore/Common"/>
-<use   name="DataFormats/EgammaCandidates"/>
-<use   name="DataFormats/MuonReco"/>
-<use   name="DataFormats/JetReco"/>
-<use   name="DataFormats/Common"/>
-<use   name="Geometry/CaloTopology"/>
-<use   name="Geometry/Records"/>
-<use   name="RecoEcal/EgammaCoreTools"/>
-<use   name="RecoJets/JetAlgorithms"/>
-<use   name="HLTrigger/HLTcore"/>
+<use name="FWCore/Framework"/>
+<use name="FWCore/PluginManager"/>
+<use name="FWCore/ParameterSet"/>
+<use name="FWCore/Common"/>
+<use name="DataFormats/EgammaCandidates"/>
+<use name="DataFormats/MuonReco"/>
+<use name="DataFormats/JetReco"/>
+<use name="DataFormats/Common"/>
+<use name="Geometry/CaloTopology"/>
+<use name="Geometry/Records"/>
+<use name="RecoEcal/EgammaCoreTools"/>
+<use name="RecoJets/JetAlgorithms"/>
+<use name="HLTrigger/HLTcore"/>
 <use name="CommonTools/UtilAlgos"/>
-<use name="RecoEgamma/EgammaTools" />
+<use name="RecoEgamma/EgammaTools"/>
 <use name="PhysicsTools/UtilAlgos"/>
 <use name="DataFormats/Candidate"/>
 <use name="DataFormats/Luminosity"/>
@@ -24,4 +24,4 @@
 <use name="TrackingTools/PatternTools"/>
 <use name="TrackingTools/TransientTrack"/>
 <use name="TrackingTools/Records"/>
-<flags   EDM_PLUGIN="1"/>
+<flags EDM_PLUGIN="1"/>