#1857 Add bind values capture for SlowQueryEvent / SlowQueryListener

- changes SqlQueryEvent into an interface.
- captures the bind values the slow query used and makes those available via SlowQueryEvent
- also makes the query label and profileLocation available via SlowQueryEvent

ebean-querybean/src/test/resources/application-test.properties

@@ -4,6 +4,7 @@ ebean.ddl.initSql=init-db.sql
 ebean.dumpMetricsOnShutdown=true
 ebean.dumpMetricsOptions=sql,hash,loc
 ebean.includeLabelInSql=true
+ebean.slowQueryMillis=1
 
 datasource.default=h2