deps: update dependency org.easymock:easymock to v5.4.0 (#3079)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [org.easymock:easymock](http://easymock.org)
([source](https://togithub.com/easymock/easymock)) | `5.3.0` -> `5.4.0`
|
[![age](https://developer.mend.io/api/mc/badges/age/maven/org.easymock:easymock/5.4.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![adoption](https://developer.mend.io/api/mc/badges/adoption/maven/org.easymock:easymock/5.4.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
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|
[![confidence](https://developer.mend.io/api/mc/badges/confidence/maven/org.easymock:easymock/5.3.0/5.4.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|

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java-core/pom.xml

@@ -53,7 +53,7 @@
       <dependency>
         <groupId>org.easymock</groupId>
         <artifactId>easymock</artifactId>
-        <version>5.3.0</version>
+        <version>5.4.0</version>
         <scope>test</scope>
       </dependency>
       <dependency>