reformat test ecore files to match generated ones

src/test/resources/ecore/bigraph.ecore

 <?xml version="1.0" encoding="UTF-8"?>
-<ecore:EPackage xmi:version="2.0" xmlns:xmi="http://www.omg.org/XMI"
-                xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-                xmlns:ecore="http://www.eclipse.org/emf/2002/Ecore" name="bigraphBaseModel"
+<ecore:EPackage xmlns:xmi="http://www.omg.org/XMI" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+                xmlns:ecore="http://www.eclipse.org/emf/2002/Ecore"
+                xmi:version="2.0" name="bigraphBaseModel"
                 nsURI="http://de.tudresden.inf.st.bigraphs.models" nsPrefix="bigraphBaseModel">
     <eClassifiers xsi:type="ecore:EClass" name="BPlace" abstract="true">
-        <eStructuralFeatures xsi:type="ecore:EReference" name="bChild" upperBound="-1"
-                             eType="#//BPlace" containment="true" eOpposite="#//BPlace/bPrnt"/>
+        <eStructuralFeatures xsi:type="ecore:EReference" name="bChild" upperBound="-1" eType="#//BPlace"
+                             containment="true" eOpposite="#//BPlace/bPrnt"/>
         <eStructuralFeatures xsi:type="ecore:EReference" name="bPrnt" eType="#//BPlace" eOpposite="#//BPlace/bChild"/>
     </eClassifiers>
     <eClassifiers xsi:type="ecore:EClass" name="BRoot" eSuperTypes="#//BPlace">
@@ -13,8 +13,8 @@
                              eType="ecore:EDataType http://www.eclipse.org/emf/2002/Ecore#//EInt"/>
     </eClassifiers>
     <eClassifiers xsi:type="ecore:EClass" name="BNode" eSuperTypes="#//BPlace #//NameableType">
-        <eStructuralFeatures xsi:type="ecore:EReference" name="bPorts" upperBound="-1"
-                             eType="#//BPort" containment="true" eOpposite="#//BPort/bNode"/>
+        <eStructuralFeatures xsi:type="ecore:EReference" name="bPorts" upperBound="-1" eType="#//BPort"
+                             containment="true" eOpposite="#//BPort/bNode"/>
     </eClassifiers>
     <eClassifiers xsi:type="ecore:EClass" name="BSite" eSuperTypes="#//BPlace">
         <eStructuralFeatures xsi:type="ecore:EAttribute" name="index"