Don't set profile var as VM name when destroying

Setting profile as the VM's name in destroy() causes an error further down in `salt/cloud/__init__.py`:

    [ERROR   ] There was an error destroying machines: u'test'
    Traceback (most recent call last):
      File "/srv/salt-dev/salt/cloud/cli.py", line 162, in run
        ret = mapper.destroy(names, cached=True)
      File "/srv/salt-dev/salt/cloud/__init__.py", line 896, in destroy
        'minion', vm_, self.opts, default={}
      File "/srv/salt-dev/salt/config.py", line 1582, in get_cloud_config_value
        if name in opts['profiles'][vm_['profile']]:
    KeyError: u'test'

It doesn't look to me like this should have any other impact, but I can't be 100%.. ;0

@techhat @s0undt3ch is anything happening wrt to test in salt cloud now? (also hi!)