removed 3.0 constraints from 2.7 composer files

Author: fabpot

composer.json

@@ -20,16 +20,16 @@
         "doctrine/common": "~2.3"
     },
     "require-dev": {
-        "symfony/phpunit-bridge": "~2.7|~3.0.0",
-        "symfony/stopwatch": "~2.2|~3.0.0",
-        "symfony/dependency-injection": "~2.2|~3.0.0",
-        "symfony/form": "~2.7|~3.0.0",
-        "symfony/http-kernel": "~2.2|~3.0.0",
-        "symfony/property-access": "~2.3|~3.0.0",
-        "symfony/security": "~2.2|~3.0.0",
-        "symfony/expression-language": "~2.2|~3.0.0",
-        "symfony/validator": "~2.5,>=2.5.5|~3.0.0",
-        "symfony/translation": "~2.0,>=2.0.5|~3.0.0",
+        "symfony/phpunit-bridge": "~2.7",
+        "symfony/stopwatch": "~2.2",
+        "symfony/dependency-injection": "~2.2",
+        "symfony/form": "~2.7",
+        "symfony/http-kernel": "~2.2",
+        "symfony/property-access": "~2.3",
+        "symfony/security": "~2.2",
+        "symfony/expression-language": "~2.2",
+        "symfony/validator": "~2.5,>=2.5.5",
+        "symfony/translation": "~2.0,>=2.0.5",
         "doctrine/data-fixtures": "1.0.*",
         "doctrine/dbal": "~2.2",
         "doctrine/orm": "~2.2,>=2.2.3"