merged branch igorw/doctrine-lazy-conn (PR #722)

This PR was squashed before being merged into the 1.0 branch (closes #722).

Discussion
----------

Make DoctrineServiceProvider db connection lazy

Specifically, do not create all connections early, only create them as
needed.

Commits
-------

9cf31e47 Make DoctrineServiceProvider db connection lazy

doc/changelog.rst

@@ -4,7 +4,7 @@ Changelog
 1.0.1 (2013-XX-XX)
 ------------------
 
-* n/a
+* Make ``DoctrineServiceProvider`` multi-db support lazy.
 
 1.0.0 (2013-05-03)
 ------------------

src/Silex/Provider/DoctrineServiceProvider.php

@@ -74,7 +74,9 @@ class DoctrineServiceProvider implements ServiceProviderInterface
                     $manager = $app['dbs.event_manager'][$name];
                 }
 
-                $dbs[$name] = DriverManager::getConnection($options, $config, $manager);
+                $dbs[$name] = $dbs->share(function ($dbs) use ($options, $config, $manager) {
+                    return DriverManager::getConnection($options, $config, $manager);
+                });
             }
 
             return $dbs;