add collections4 dependency

pom.xml

@@ -126,12 +126,11 @@ cobbzilla-utils is available under the Apache License, version 2: http://www.apa
             <groupId>commons-beanutils</groupId>
             <artifactId>commons-beanutils</artifactId>
             <version>${commons-beanutils.version}</version>
-            <exclusions>
-                <exclusion>
-                    <groupId>commons-collections</groupId>
-                    <artifactId>commons-collections</artifactId>
-                </exclusion>
-            </exclusions>
+        </dependency>
+        <dependency>
+            <groupId>org.apache.commons</groupId>
+            <artifactId>commons-collections4</artifactId>
+            <version>${commons-collections4.version}</version>
         </dependency>
 
         <dependency>