[test] Introduce JUnit 5 and AssertJ dependencies

pom.xml

@@ -84,10 +84,31 @@ under the License.
         <oblogclient.version>1.1.0</oblogclient.version>
         <commons-lang3.version>3.12.0</commons-lang3.version>
         <json-path.version>2.7.0</json-path.version>
+        <junit5.version>5.10.1</junit5.version>
+        <junit4.version>4.13.2</junit4.version>
+        <assertj.version>3.24.2</assertj.version>
         <markBundledAsOptional>true</markBundledAsOptional>
         <flatten-maven-plugin.version>1.5.0</flatten-maven-plugin.version>
     </properties>
 
+    <dependencyManagement>
+        <dependencies>
+            <dependency>
+                <groupId>org.junit</groupId>
+                <artifactId>junit-bom</artifactId>
+                <version>${junit5.version}</version>
+                <type>pom</type>
+                <scope>import</scope>
+            </dependency>
+
+            <dependency>
+                <groupId>junit</groupId>
+                <artifactId>junit</artifactId>
+                <version>${junit4.version}</version>
+            </dependency>
+        </dependencies>
+    </dependencyManagement>
+
     <dependencies>
         <!-- Apache Flink dependencies -->
         <!-- These dependencies are provided, because they should not be packaged into the JAR file. -->
@@ -176,6 +197,25 @@ under the License.
             <type>jar</type>
             <version>${version.awaitility}</version>
         </dependency>
+
+        <dependency>
+            <groupId>org.junit.jupiter</groupId>
+            <artifactId>junit-jupiter</artifactId>
+            <scope>test</scope>
+        </dependency>
+
+        <dependency>
+            <groupId>org.junit.vintage</groupId>
+            <artifactId>junit-vintage-engine</artifactId>
+            <scope>test</scope>
+        </dependency>
+
+        <dependency>
+            <groupId>org.assertj</groupId>
+            <artifactId>assertj-core</artifactId>
+            <version>${assertj.version}</version>
+            <scope>test</scope>
+        </dependency>
     </dependencies>
 
     <build>