jclMin1.8.jar is not complete for 1.8 JLS target tests

+ update jclMin1.8
+ also fixes NullAnnotationModelTests.testBug565246 error reporting

Fixes eclipse-jdt#2756

JCL/jclMin1.8/src/java/lang/Iterable.java

@@ -0,0 +1,7 @@
+package java.lang;
+
+import java.util.Iterator;
+
+public interface Iterable<T> {
+    Iterator<T> iterator();
+}

JCL/jclMin1.8/src/java/util/Collection.java

@@ -10,7 +10,7 @@
  *******************************************************************************/
 package java.util;
 
-public interface Collection<T> {
+public interface Collection<T> extends Iterable<T> {
 	public Iterator<T> iterator();
 	public int size();
 	public T get(int index);

org.eclipse.jdt.core.tests.model/src/org/eclipse/jdt/core/tests/model/NullAnnotationModelTests.java

@@ -1108,7 +1108,7 @@ public void testBug479389() throws CoreException, IOException {
 			deleteProject(project);
 		}
 	}
-	public void _2551_testBug565246() throws CoreException {
+	public void testBug565246() throws CoreException {
 		IJavaProject project = createJavaProject("Bug565246", new String[] {"src"}, new String[] {"JCL18_LIB", this.ANNOTATION_LIB_V1}, "bin", CompilerOptions.getFirstSupportedJavaVersion());
 		try {
 			project.setOption(JavaCore.COMPILER_ANNOTATION_NULL_ANALYSIS, JavaCore.ENABLED);
@@ -1126,7 +1126,7 @@ public void _2551_testBug565246() throws CoreException {
 			getWorkspace().build(IncrementalProjectBuilder.FULL_BUILD, null);
 
 			String testSourcePath = "Bug565246/src/Test.java";
-			createFile(testSourcePath,
+			String testSourceContent =
 					"import org.eclipse.jdt.annotation.NonNull;\n" +
 					"import java.util.Collection;\n" +
 					"public class Test {\n" +
@@ -1135,7 +1135,9 @@ public void _2551_testBug565246() throws CoreException {
 					"			bar(s);\n" +
 					"	}\n" +
 					"	void bar(@NonNull String s) {}\n" +
-					"}\n");
+					"}\n";
+			createFile(testSourcePath, testSourceContent);
+			this.problemRequestor.initialize(testSourceContent.toCharArray());
 
 			getCompilationUnit(testSourcePath).getWorkingCopy(this.wcOwner, null);
 			assertProblems("", "----------\n----------\n");