Fix dependency convergence error on commons-collections:commons-colle…

…ctions:jar:3.2.2/3.2.1

```
[ERROR] Rule 2: org.apache.maven.enforcer.rules.dependency.DependencyConvergence failed with message:
[ERROR] Failed while enforcing releasability.
[ERROR]
[ERROR] Dependency convergence error for commons-collections:commons-collections:jar:3.2.1 paths to dependency are:
[ERROR] +-org.geoserver.acl.plugin:gs-acl-plugin-accessmanager:jar:2.3-SNAPSHOT
[ERROR]   +-org.geoserver:gs-main:jar:2.26-SNAPSHOT:provided
[ERROR]     +-net.sf.json-lib:json-lib:jar:2.4.2-geoserver:provided
[ERROR]       +-commons-collections:commons-collections:jar:3.2.1:provided
[ERROR] and
[ERROR] +-org.geoserver.acl.plugin:gs-acl-plugin-accessmanager:jar:2.3-SNAPSHOT
[ERROR]   +-org.geoserver:gs-main:jar:2.26-SNAPSHOT:provided
[ERROR]     +-commons-beanutils:commons-beanutils:jar:1.9.4:provided
[ERROR]       +-commons-collections:commons-collections:jar:3.2.2:provided
```

src/pom.xml

@@ -234,6 +234,11 @@
             <artifactId>commons-beanutils</artifactId>
             <version>1.9.4</version>
           </dependency>
+          <dependency>
+            <groupId>commons-collections</groupId>
+            <artifactId>commons-collections</artifactId>
+            <version>3.2.2</version>
+          </dependency>
         </dependencies>
       </dependencyManagement>
     </profile>