Switch to use the new faststart containers for Oracle DB

Author: Sanne

README.md

@@ -188,6 +188,8 @@ don't need to create the test databases manually. Just type:
 
     ./gradlew test -Pdocker
 
+The above command will start a PostgreSQL instance, which is the default target.
+
 Or:
 
     ./gradlew test -Pdocker -Pdb=mysql
@@ -200,6 +202,10 @@ Or:
 
     ./gradlew test -Pdocker -Pdb=db2
 
+Or:
+
+    ./gradlew test -Pdocker -Pdb=oracle
+
 The tests will run faster if you reuse the same containers across 
 multiple test runs. To do this, edit the testcontainers configuration 
 file `.testcontainers.properties` in your home directory, adding the 

hibernate-reactive-core/src/test/java/org/hibernate/reactive/containers/OracleDatabase.java

@@ -82,7 +82,7 @@ class OracleDatabase implements TestableDatabase {
 		}
 	}
 
-	public static final OracleContainer oracle = new OracleContainer( imageName( "gvenzl/oracle-xe", "21.3.0-slim" ) )
+	public static final OracleContainer oracle = new OracleContainer( imageName( "gvenzl/oracle-xe", "21-slim-faststart" ) )
 			.withUsername( DatabaseConfiguration.USERNAME )
 			.withPassword( DatabaseConfiguration.PASSWORD )
 			.withDatabaseName( DatabaseConfiguration.DB_NAME )

podman.md

@@ -206,5 +206,5 @@ and schema to run the tests:
 [oracle]:https://www.oracle.com/database/technologies/appdev/xe.html
 
 ```
-podman run --rm --name $NAME -e ORACLE_PASSWORD=hreact -e APP_USER=hreact -e APP_USER_PASSWORD=hreact -e ORACLE_DATABASE=hreact -p 1521:1521 gvenzl/oracle-xe:21.3.0-slim
+podman run --rm --name HibernateTestingOracle -e ORACLE_PASSWORD=hreact -e APP_USER=hreact -e APP_USER_PASSWORD=hreact -e ORACLE_DATABASE=hreact -p 1521:1521 docker.io/gvenzl/oracle-xe:21-slim-faststart
 ```