Reduce doctrine-orm-module depenence to rely on dependencies through dat...

...a-fixtures rather than requiring dev-master

I'm writing an ORM + ODM app with these dependencies which cannot resolve with the dev-master require for orm-module from DoctrineDataFixtureModule.

By changing to "*" it lets dependencies waterfall from doctrine/data-fixtures

        "php": ">=5.4",
        "zendframework/zendframework": ">2.1",

        "doctrine/common": "2.3.x-dev",
        "doctrine/dbal": "2.3.x-dev",
        "doctrine/orm": "2.3.x-dev",
        "doctrine/migrations": "v1.0-ALPHA1",
        "doctrine/doctrine-module": "0.7.2",
        "doctrine/doctrine-orm-module": "0.7.0",
        "doctrine/doctrine-mongo-odm-module": "0.8.*@dev",
        "doctrine/data-fixtures": "dev-master",
        "hounddog/doctrine-data-fixture-module": "dev-master",