Fix xsd uri schema

Author: abluchet

features/jsonld/context.feature

@@ -40,6 +40,7 @@ Feature: JSON-LD contexts generation
             },
             "jsonData": "#Dummy/jsonData",
             "nameConverted": "#Dummy/nameConverted",
+						"id": "#Dummy/id",
             "name": "http://schema.org/name",
             "alias": "https://schema.org/alternateName",
             "foo": "#Dummy/foo"

tests/Fixtures/FileConfigurations/legacyoperations.xml

@@ -1,6 +1,9 @@
 <?xml version="1.0" encoding="UTF-8" ?>
 
-<resources>
+<resources xmlns="https://api-platform.com/schema/metadata"
+           xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+           xsi:schemaLocation="https://api-platform.com/schema/metadata
+           https://api-platform.com/schema/metadata/metadata-2.0.xsd">
         <resource class="ApiPlatform\Core\Tests\Fixtures\TestBundle\Entity\FileConfigDummy">
             <itemOperation name="my_op_name">
                 <attribute name="method">POST</attribute>

tests/Fixtures/FileConfigurations/nocollectionoperations.xml

@@ -1,6 +1,9 @@
 <?xml version="1.0" encoding="UTF-8" ?>
 
-<resources>
+<resources xmlns="https://api-platform.com/schema/metadata"
+           xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+           xsi:schemaLocation="https://api-platform.com/schema/metadata
+           https://api-platform.com/schema/metadata/metadata-2.0.xsd">
         <resource class="ApiPlatform\Core\Tests\Fixtures\TestBundle\Entity\FileConfigDummy">
             <itemOperations>
                 <itemOperation name="my_op_name">

tests/Fixtures/FileConfigurations/noitemoperations.xml

@@ -1,6 +1,9 @@
 <?xml version="1.0" encoding="UTF-8" ?>
 
-<resources>
+<resources xmlns="https://api-platform.com/schema/metadata"
+           xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+           xsi:schemaLocation="https://api-platform.com/schema/metadata
+           https://api-platform.com/schema/metadata/metadata-2.0.xsd">
         <resource class="ApiPlatform\Core\Tests\Fixtures\TestBundle\Entity\FileConfigDummy">
             <itemOperations />
             <collectionOperations>