Upgrade DB2 driver to 11.5.5.0.

Original pull request: #961.

pom.xml

@@ -31,8 +31,7 @@
 
 		<!-- databases and jdbc drivers -->
 		<!-- not that these currently do not control the versions of databases used via Testcontainers for testing -->
-		<db2.version>11.5.0.0</db2.version>
-		<db2.jcc.version>11.1.4.4</db2.jcc.version>
+		<db2.version>11.5.5.0</db2.version>
 		<h2.version>1.4.200</h2.version>
 		<hsqldb.version>2.5.2</hsqldb.version>
 		<mariadb-java-client.version>2.7.2</mariadb-java-client.version>

spring-data-jdbc/pom.xml

@@ -196,7 +196,7 @@
 		<dependency>
 			<groupId>com.ibm.db2</groupId>
 			<artifactId>jcc</artifactId>
-			<version>${db2.jcc.version}</version>
+			<version>${db2.version}</version>
 			<scope>test</scope>
 		</dependency>