Use HikariCP is jdbc and jpa starters

This commit is a companion of what was done in #6013. As HikariCP is
now the default connection pool, the jdbc and jpa starters no longer
provide `tomcat-jdbc`, but rather `HikariCP`.

Closes gh-9392

spring-boot-devtools/pom.xml

@@ -112,6 +112,11 @@
 			<artifactId>h2</artifactId>
 			<scope>test</scope>
 		</dependency>
+		<dependency>
+			<groupId>com.zaxxer</groupId>
+			<artifactId>HikariCP</artifactId>
+			<scope>test</scope>
+		</dependency>
 		<dependency>
 			<groupId>org.springframework</groupId>
 			<artifactId>spring-webmvc</artifactId>
@@ -183,10 +188,5 @@
 			<artifactId>thymeleaf-layout-dialect</artifactId>
 			<scope>test</scope>
 		</dependency>
-		<dependency>
-			<groupId>org.apache.tomcat</groupId>
-			<artifactId>tomcat-jdbc</artifactId>
-			<scope>test</scope>
-		</dependency>
 	</dependencies>
 </project>

spring-boot-devtools/src/test/java/org/springframework/boot/devtools/autoconfigure/DevToolsEmbeddedDataSourceAutoConfigurationTests.java

@@ -38,7 +38,7 @@ import static org.mockito.Mockito.verify;
  * @author Andy Wilkinson
  */
 @RunWith(ModifiedClassPathRunner.class)
-@ClassPathExclusions("tomcat-jdbc-*.jar")
+@ClassPathExclusions("HikariCP-*.jar")
 public class DevToolsEmbeddedDataSourceAutoConfigurationTests
 		extends AbstractDevToolsDataSourceAutoConfigurationTests {