Removed unused imports and add missing Override statements (no effective code change)

ebean-test/src/main/java/io/ebean/test/config/AutoConfigureForTesting.java

@@ -10,8 +10,6 @@ import org.slf4j.LoggerFactory;
 
 import java.util.Properties;
 
-import javax.sql.DataSource;
-
 /**
  * Automatically configure ServerConfig for testing purposes.
  * <p>

ebean-test/src/main/java/io/ebean/test/config/platform/Config.java

@@ -5,7 +5,6 @@ import io.ebean.datasource.DataSourceConfig;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import java.io.File;
-import java.util.Locale;
 import java.util.Properties;
 
 /**