[tests] javadoc highlighting tests merger and cleanup

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/javaDoc/DuplicateThrows.java

@@ -0,0 +1,9 @@
+class Test {
+  /**
+   * Test.
+   * @throws java.lang.Exception in case of problems
+   * <warning descr="Duplicate @throws or @exception tag for exception 'java.lang.Exception'">@exception</warning> java.lang.Exception in case of other problems
+   */
+  void test() throws java.lang.Exception {
+  }
+}