[2.7][DX] Use constant message contextualisation for deprecations

Author: romainneutron

Encoder/JsonDecode.php

@@ -49,7 +49,7 @@ public function __construct($associative = false, $depth = 512)
      */
     public function getLastError()
     {
-        @trigger_error('The '.__METHOD__.' method is deprecated since version 2.5 and will be removed in 3.0. Catch the exception raised by the decode() method instead to get the last JSON decoding error.', E_USER_DEPRECATED);
+        @trigger_error('The '.__METHOD__.' method is deprecated since Symfony 2.5 and will be removed in 3.0. Catch the exception raised by the decode() method instead to get the last JSON decoding error.', E_USER_DEPRECATED);
 
         return $this->lastError;
     }

Encoder/JsonEncode.php

@@ -39,7 +39,7 @@ public function __construct($bitmask = 0)
      */
     public function getLastError()
     {
-        @trigger_error('The '.__METHOD__.' method is deprecated since version 2.5 and will be removed in 3.0. Catch the exception raised by the encode() method instead to get the last JSON encoding error.', E_USER_DEPRECATED);
+        @trigger_error('The '.__METHOD__.' method is deprecated since Symfony 2.5 and will be removed in 3.0. Catch the exception raised by the encode() method instead to get the last JSON encoding error.', E_USER_DEPRECATED);
 
         return $this->lastError;
     }

Encoder/JsonEncoder.php

@@ -38,7 +38,7 @@ public function __construct(JsonEncode $encodingImpl = null, JsonDecode $decodin
      */
     public function getLastEncodingError()
     {
-        @trigger_error('The '.__METHOD__.' method is deprecated since version 2.5 and will be removed in 3.0. Catch the exception raised by the Symfony\Component\Serializer\Encoder\JsonEncode::encode() method instead to get the last JSON encoding error.', E_USER_DEPRECATED);
+        @trigger_error('The '.__METHOD__.' method is deprecated since Symfony 2.5 and will be removed in 3.0. Catch the exception raised by the Symfony\Component\Serializer\Encoder\JsonEncode::encode() method instead to get the last JSON encoding error.', E_USER_DEPRECATED);
 
         return $this->encodingImpl->getLastError();
     }
@@ -52,7 +52,7 @@ public function getLastEncodingError()
      */
     public function getLastDecodingError()
     {
-        @trigger_error('The '.__METHOD__.' method is deprecated since version 2.5 and will be removed in 3.0. Catch the exception raised by the Symfony\Component\Serializer\Encoder\JsonDecode::decode() method instead to get the last JSON decoding error.', E_USER_DEPRECATED);
+        @trigger_error('The '.__METHOD__.' method is deprecated since Symfony 2.5 and will be removed in 3.0. Catch the exception raised by the Symfony\Component\Serializer\Encoder\JsonDecode::decode() method instead to get the last JSON decoding error.', E_USER_DEPRECATED);
 
         return $this->decodingImpl->getLastError();
     }