Added relevant articles

Naoshadul Islam · web-flow · commit f528fbf7cfaf · 2017-01-15T21:05:01.000+06:00
diff --git a/core-java/src/test/java/org/baeldung/java/collections/README.md b/core-java/src/test/java/org/baeldung/java/collections/README.md
@@ -1,2 +1,3 @@
 ### Relevant Articles:
 - [Join and Split Arrays and Collections in Java](http://www.baeldung.com/java-join-and-split)
+- [Introduction to Java Servlets](http://www.baeldung.com/intro-to-servlets)

Original file line number	Diff line number	Diff line change
`@@ -1,2 +1,3 @@`
`1`	`1`	`### Relevant Articles:`
`2`	`2`	`- [Join and Split Arrays and Collections in Java](http://www.baeldung.com/java-join-and-split)`
	`3`	`+- [Introduction to Java Servlets](http://www.baeldung.com/intro-to-servlets)`