minor #7267 Fix sample sqlite database path in doctrine config (chalasr, javiereguiluz)

This PR was submitted for the master branch but it was merged into the 2.7 branch instead (closes #7267).

Discussion
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Fix sample sqlite database path in doctrine config

Port of #7263 for 2.7

Commits
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048579b %kernel.root_dir%/app/data/data.sqlite -> %kernel.root_dir%/data/data.sqlite
e1115e5 Fix sample sqlite database path in doctrine config

Author: xabbuh

reference/configuration/doctrine.rst

@@ -203,7 +203,7 @@ Full Default Configuration
                         password="secret"
                         driver="pdo_mysql"
                         driver-class="MyNamespace\MyDriverImpl"
-                        path="%kernel.data_dir%/data.sqlite"
+                        path="%kernel.root_dir%/data/data.sqlite"
                         memory="true"
                         unix-socket="/tmp/mysql.sock"
                         wrapper-class="MyDoctrineDbalConnectionWrapper"
@@ -395,7 +395,7 @@ The following block shows all possible configuration keys:
                 # the DBAL driverOptions option
                 options:
                     foo: bar
-                path:                 '%kernel.data_dir%/data.sqlite'
+                path:                 '%kernel.root_dir%/data/data.sqlite'
                 memory:               true
                 unix_socket:          /tmp/mysql.sock
                 # the DBAL wrapperClass option
@@ -431,7 +431,7 @@ The following block shows all possible configuration keys:
                     password="secret"
                     driver="pdo_mysql"
                     driver-class="MyNamespace\MyDriverImpl"
-                    path="%kernel.data_dir%/data.sqlite"
+                    path="%kernel.root_dir%/data/data.sqlite"
                     memory="true"
                     unix-socket="/tmp/mysql.sock"
                     wrapper-class="MyDoctrineDbalConnectionWrapper"