add missing default-doctrine-dbal-provider cache pool attribute to XSD

Author: xabbuh

Resources/config/schema/symfony-1.0.xsd

@@ -290,6 +290,7 @@
             <xsd:element name="default-psr6-provider" type="xsd:string" minOccurs="0" maxOccurs="1" />
             <xsd:element name="default-redis-provider" type="xsd:string" minOccurs="0" maxOccurs="1" />
             <xsd:element name="default-memcached-provider" type="xsd:string" minOccurs="0" maxOccurs="1" />
+            <xsd:element name="default-doctrine-dbal-provider" type="xsd:string" minOccurs="0" maxOccurs="1" />
             <xsd:element name="default-pdo-provider" type="xsd:string" minOccurs="0" maxOccurs="1" />
             <xsd:element name="pool" type="cache_pool" minOccurs="0" maxOccurs="unbounded" />
         </xsd:sequence>