Remove MiqDialog.seed in specs

Time across the specs has dropped from 33.45s down to 18.64s

@jrafanie Please review.

~~Additionally, there is an MiqDialog.seed in [miq_host_provision_workflow_spec.rb](https://github.com/ManageIQ/manageiq/blob/aa59eecaeba39f1efdfbb3153e8757e59f80d5b4/vmdb/spec/models/miq_host_provision_workflow_spec.rb#L10), but one of the specs is pending.  Reading the history of the pending spec it says~~

```
commit f8c8148718fc03a79eda98e22abeff6bc921814a
Author: Oleg Barenboim <obarenbo@redhat.com>
Date:   Tue Aug 7 21:25:56 2012 +0000

    Marked test for MiqHostProvisionWorkflow.from_ws as pending (since we do not support web services for host provisioning).
    
    git-svn-id: http://miq-ubuntusub.manageiq.com/svn/svnrepos/Manageiq/trunk@37974 3c68ef56-dcc3-11dc-9475-a42b84ecc76f
```

~~So, if web services for host provisioning are not support anyway, should this whole file just get deleted altogether?  I can make the specs all pass too, if we want to keep it, but this comment has me puzzled, because I would expect all the specs to fail. @gmcculloug What do you think?~~

EDIT: This PR now tests that entry point because it is a valid entry point.
:see_no_evil: