Reset the metrics after initialisation of the pool

This is desired in the K8s case where we likely want to use
initialConnection to oversize the connection pool on pod
startup, with it shrinking back down over time.

Author: rbygrave

ebean-datasource/src/main/java/io/ebean/datasource/pool/ConnectionPool.java

@@ -155,6 +155,8 @@ private void init() {
         initialiseDatabase();
       }
       initialiseConnections();
+      // reset the metrics
+      status(true);
     } catch (SQLException e) {
       throw new DataSourceInitialiseException("Error initialising DataSource with user: " + user + " error:" + e.getMessage(), e);
     }