build(deps): bump org.testcontainers:testcontainers-bom from 1.21.3 to 2.0.3 in /samples/java/jdbc (#4020)

* build(deps): bump org.testcontainers:testcontainers-bom

Bumps [org.testcontainers:testcontainers-bom](https://github.com/testcontainers/testcontainers-java) from 1.21.3 to 2.0.3.
- [Release notes](https://github.com/testcontainers/testcontainers-java/releases)
- [Changelog](https://github.com/testcontainers/testcontainers-java/blob/main/CHANGELOG.md)
- [Commits](testcontainers/testcontainers-java@1.21.3...2.0.3)

---
updated-dependencies:
- dependency-name: org.testcontainers:testcontainers-bom
  dependency-version: 2.0.3
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

* chore: add junit

---------

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Knut Olav Løite <koloite@gmail.com>

Author: dependabot[bot]

samples/java/jdbc/pom.xml

@@ -39,7 +39,7 @@
       <dependency>
         <groupId>org.testcontainers</groupId>
         <artifactId>testcontainers-bom</artifactId>
-        <version>1.21.4</version>
+        <version>2.0.3</version>
         <type>pom</type>
         <scope>import</scope>
       </dependency>
@@ -74,6 +74,12 @@
       <groupId>org.testcontainers</groupId>
       <artifactId>testcontainers</artifactId>
     </dependency>
+    <dependency>
+      <groupId>junit</groupId>
+      <artifactId>junit</artifactId>
+      <version>4.13.2</version>
+      <scope>test</scope>
+    </dependency>
   </dependencies>
   <build>
     <plugins>