First commit to migrate the following articles from core-java:

* to core-java-lang:
  * https://www.baeldung.com/java-reflection
  * https://www.baeldung.com/java-generics
  * https://www.baeldung.com/java-eclipse-equals-and-hashcode
  * https://www.baeldung.com/java-chained-exceptions
  * https://www.baeldung.com/java-primitive-conversions //to package
  * https://www.baeldung.com/java-method-reflection
  * https://www.baeldung.com/java-enum-iteration
  * https://www.baeldung.com/java-reflection-change-annotation-params
  * https://www.baeldung.com/java-dynamic-proxies
  * https://www.baeldung.com/java-double-brace-initialization
  * https://www.baeldung.com/java-hashcode
  * https://www.baeldung.com/java-diamond-operator
  * https://www.baeldung.com/java-static (?https://github.com/eugenp/tutorials/pull/3392)
  * https://www.baeldung.com/java-comparator-comparable
  * https://www.baeldung.com/java-continue-and-break
  * https://www.baeldung.com/java-initialization
  * https://www.baeldung.com/java-nested-classes
  * https://www.baeldung.com/java-loops
  * https://www.baeldung.com/java-varargs

pom.xml

@@ -356,6 +356,7 @@
 				<module>java-strings</module>
 				<!--<module>core-java-9</module> --> <!-- Commented because we have still not upgraded to java 9 -->
 				<module>core-java</module>
+				<module>core-java-lang</module>
 				<module>core-java-collections</module>
 				<module>java-collections-conversions</module>
 				<module>java-collections-maps</module>