Remove redundant metadata for JOOQ’s SQL dialect

Also add a test that I’d written before Phil fixed the problem in
5dbe623.

See gh-3468

spring-boot-autoconfigure/src/main/resources/META-INF/additional-spring-configuration-metadata.json

@@ -236,17 +236,6 @@
       }
     ]
   },
-  {
-    "name": "spring.jooq.sql-dialect",
-    "providers": [
-      {
-        "name": "handle-as",
-        "parameters": {
-          "target": "org.jooq.SQLDialect"
-        }
-      }
-    ]
-  },
   {
     "name": "spring.jmx.server",
     "providers": [

spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/jooq/JooqAutoConfigurationTests.java

@@ -48,6 +48,7 @@ import org.springframework.jdbc.datasource.DataSourceTransactionManager;
 import org.springframework.transaction.PlatformTransactionManager;
 
 import static org.hamcrest.Matchers.equalTo;
+import static org.hamcrest.Matchers.is;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertThat;
 import static org.junit.Assert.fail;
@@ -57,6 +58,7 @@ import static org.junit.Assert.fail;
  *
  * @author Andreas Ahlenstorf
  * @author Phillip Webb
+ * @author Andy Wilkinson
  */
 public class JooqAutoConfigurationTests {
 
@@ -155,6 +157,15 @@ public class JooqAutoConfigurationTests {
 		assertThat(dsl.configuration().visitListenerProviders().length, equalTo(1));
 	}
 
+	@Test
+	public void relaxedBindingOfSqlDialect() {
+		EnvironmentTestUtils.addEnvironment(this.context,
+				"spring.jooq.sql-dialect:PoSTGrES");
+		registerAndRefresh(JooqDataSourceConfiguration.class, JooqAutoConfiguration.class);
+		assertThat(this.context.getBean(org.jooq.Configuration.class).dialect(),
+				is(equalTo(SQLDialect.POSTGRES)));
+	}
+
 	private void registerAndRefresh(Class<?>... annotatedClasses) {
 		this.context.register(annotatedClasses);
 		this.context.refresh();