Fic compatibility of hamcrest with java 6

sonar-duplications/src/test/java/org/sonar/duplications/detector/CloneGroupMatcher.java

  */
 package org.sonar.duplications.detector;
 
-import org.hamcrest.CoreMatchers;
 import org.hamcrest.Description;
 import org.hamcrest.Matcher;
 import org.hamcrest.TypeSafeMatcher;
 import org.sonar.duplications.index.CloneGroup;
 import org.sonar.duplications.index.ClonePart;
 
+import static org.hamcrest.Matchers.hasItem;
+
 public class CloneGroupMatcher extends TypeSafeMatcher<CloneGroup> {
 
   public static Matcher<Iterable<? super CloneGroup>> hasCloneGroup(int expectedLen, ClonePart... expectedParts) {
-    return CoreMatchers.hasItem(new CloneGroupMatcher(expectedLen, expectedParts));
+    return hasItem(new CloneGroupMatcher(expectedLen, expectedParts));
   }
 
   private final int expectedLen;

sonar-plugin-api/src/test/java/org/sonar/api/batch/bootstrap/ProjectDefinitionTest.java

 import java.util.List;
 import java.util.Properties;
 
-import org.hamcrest.CoreMatchers;
 import org.junit.Test;
 import org.sonar.api.CoreProperties;
 
     def.addBinaryDir(new File("target/classes"));
 
     assertThat(def.getSourceDirs().size(), is(2));
-    assertThat(def.getTestDirs().size(), CoreMatchers.is(2));
-    assertThat(def.getBinaries().size(), CoreMatchers.is(1));
+    assertThat(def.getTestDirs().size(), is(2));
+    assertThat(def.getBinaries().size(), is(1));
   }
 
   @Test

sonar-plugin-api/src/test/java/org/sonar/api/utils/FieldUtils2Test.java

 import java.lang.reflect.Field;
 import java.util.List;
 
+import static org.hamcrest.Matchers.hasItem;
 import static org.junit.Assert.assertThat;
-import static org.junit.matchers.JUnitMatchers.hasItem;
 
 public class FieldUtils2Test {
 

sonar-ws-client/src/test/java/org/sonar/wsclient/unmarshallers/ProfileUnmarshallerTest.java

  */
 package org.sonar.wsclient.unmarshallers;
 
-import org.hamcrest.CoreMatchers;
 import org.junit.Test;
 import org.sonar.wsclient.services.Profile;
 
     Profile.Rule rule1 = profile.getRules().get(0);
     assertThat(rule1.getKey(), is("com.puppycrawl.tools.checkstyle.checks.coding.InnerAssignmentCheck"));
     assertThat(rule1.getRepository(), is("checkstyle"));
-    assertThat(rule1.getInheritance(), CoreMatchers.<Object>nullValue());
+    assertThat(rule1.getInheritance(), nullValue());
     assertThat(rule1.getSeverity(), is("MAJOR"));
     assertThat(rule1.getParameters().size(), is(0));
     assertThat(rule1.getParameter("foo"), nullValue());