BAEL-5277 generate string of repeated characters (#11611)

* BAEL-5277 generate string of repeated characters

* BAEL-5277 fixed test

* BAEL-5277 fixing tests

* removed public from class and methods, removed unnecessary test examples, extracted contants

* renamed constants

* renamed a test

* fixed the string repeat test

* removed public from class and method

* modified the test

* reset the java version

* tests added

* added apache dependency

* removed repeat method for string

* updated tests

* fixed tests

* added two additional tests

* formatted code

* renaming variables

* 1.0.0 | FIX removed unnecessary annotation

* removing EMPTY_STRING constant

Co-authored-by: Matea Pejčinović <matea.pejcinovic@intellexi.hr>

core-java-modules/core-java-string-algorithms-3/pom.xml

@@ -24,6 +24,11 @@
             <artifactId>commons-validator</artifactId>
             <version>${validator.version}</version>
         </dependency>
+        <dependency>
+            <groupId>org.apache.commons</groupId>
+            <artifactId>commons-lang3</artifactId>
+            <version>${apache-commons-lang3.version}</version>
+        </dependency>
     </dependencies>
 
     <build>
@@ -51,6 +56,7 @@
     <properties>
         <guava.version>31.0.1-jre</guava.version>
         <validator.version>1.7</validator.version>
+        <apache-commons-lang3.version>3.12.0</apache-commons-lang3.version>
     </properties>
 
 </project>