example code for BAEL-966 (#2152)

* added updated example codes

* updated example code StringToCharStream

* deleted StringToCharStream.java locally

* removed redundant file

* added code for apache commons collection SetUtils

* refactored example code

libraries/pom.xml

@@ -90,6 +90,11 @@
             <artifactId>commons-lang3</artifactId>
             <version>${commons-lang.version}</version>
         </dependency>
+        <dependency>
+            <groupId>org.apache.commons</groupId>
+            <artifactId>commons-collections4</artifactId>
+            <version>${commons.collections.version}</version>
+        </dependency>
         <dependency>
             <groupId>org.jasypt</groupId>
             <artifactId>jasypt</artifactId>
@@ -340,13 +345,17 @@
             <artifactId>opennlp-tools</artifactId>
             <version>1.8.0</version>
         </dependency>
+        <dependency>
+            <groupId>junit</groupId>
+            <artifactId>junit</artifactId>
+            <version>${junit.version}</version>
+            <scope>test</scope>
+        </dependency>
         <dependency>
             <groupId>info.debatty</groupId>
             <artifactId>java-lsh</artifactId>
             <version>${java-lsh.version}</version>
         </dependency>
-
-
     </dependencies>
     <properties>
         <multiverse.version>0.7.0</multiverse.version>
@@ -373,6 +382,8 @@
         <serenity.plugin.version>1.4.0</serenity.plugin.version>
         <jUnitParams.version>1.1.0</jUnitParams.version>
         <netty.version>4.1.10.Final</netty.version>
+        <commons.collections.version>4.1</commons.collections.version>
+        <junit.version>4.12</junit.version>
         <java-lsh.version>0.10</java-lsh.version>
     </properties>