Fix the block and file storage detail.

[FernandoOjeda]

Fix block and file storage detail #1229.
This works for block and file storage with id and name identifier.

Valid name:
slcli -v file volume-detail SL01SEV30_1

Valid id
slcli -v file volume-detail 11111

Bad name
slcli -v file volume-detail test
Error: Unable to find File Storage 'test'

[coveralls]

Coverage increased (+0.01%) to 93.838% when pulling b07e0ec on FernandoOjeda:fo_block_file_storage_detail into 8c87513 on softlayer:master.

[allmightyspiff]

1. Move the id resolver to the managers
2. make sure to pass in just the id for the list volumes method
3. Make sure to pass in a username to the list volumes methods
4. Only need to test for a few strings, not the whole output
5. Test to make sure the appropriate API calls were called.

[allmightyspiff]

lets move this to the block and file managers as _get_ids_from_username(username)

Then add it as a resolver to the manager itself.

class BlockStorageManager(utils.IdentifierMixin, object):
    def __init__(self, client):
        self.configuration = {}
        self.client = client
        self.resolvers = [self._get_ids_from_username]

[allmightyspiff]

list_block_volumes() takes in a username parameter to filter by that, which will let you only get the volume back that matches the username. Also pass in a mask of just id help reduce API call returned data.

[allmightyspiff]

since were moving get_block_volume_id to the block manager's resolvers feature, we can just remove this line and the rest should work.

[allmightyspiff]

We don't really need to test the WHOLE output is equal, that will make this test break anytime we change the fixture.

Instead you can do something like this to test a few fields of the output

    self.assert_called_with('SoftLayer_Network_Storage', 'getObject')
    self.assertIn('username', result.output)
    self.assertIn('READHEAVY_TIER', result.output)

or whatever other strings you want to look for to make sure it called the correct data.

[allmightyspiff]

I've added your changes to #1235