[Misc] Increase even more the DB timeouts

xwiki-platform-core/xwiki-platform-test/xwiki-platform-test-docker/src/main/java/org/xwiki/test/docker/internal/junit5/database/DatabaseContainerExecutor.java

@@ -265,14 +265,16 @@ private void startDatabaseContainer(JdbcDatabaseContainer<?> databaseContainer,
         TestConfiguration testConfiguration) throws Exception
     {
         // Note: default startup and connect timeout are at 120s (2mn) but we've noticed cases when it was taking
-        // longer than that on XWiki and thus our SQL code in grantMySQLPrivileges() is failing because of that.
-        // Thus we're doubling the timeouts to be safe.
+        // a lot longer than that and thus our SQL code in grantMySQLPrivileges() is failing because after the timeout
+        // is reached, TC considers that the DB container is started and thus our SQL code is executed even though the
+        // DB is not started, and this, it fails. We've increased the timeouts to 15mn which is a lot and we might need
+        // to debug to find out why MySQL is taking so long to start in these cases.
         databaseContainer
             .withExposedPorts(port)
             .withNetwork(Network.SHARED)
             .withNetworkAliases("xwikidb")
-            .withStartupTimeoutSeconds(240)
-            .withConnectTimeoutSeconds(240);
+            .withStartupTimeoutSeconds(900)
+            .withConnectTimeoutSeconds(900);
 
         start(databaseContainer, testConfiguration);