Without this patch the sensu-server-enterprise Vagrant VM is not managing the
Service[sensu-enterprise] resource.  This is a problem for testing the behavior
changes made in #720.

This patch addresses the problem by changing the class parameters of the
provisioning manifest for sensu-server-enterprise.  The credentials for the
Sensu Enterprise repository are expected to be set in the shell environment
where `vagrant up` is executed.

For example, the following direnv `.envrc` is sufficient for this project:

```
export FACTER_SE_USER='1234567890'
export FACTER_SE_PASS='Password1'
```

Without this patch The sensu-enterprise service is not notified automatically
when `sensu::check` resources are declared.  This patch addresses the problem
by checking the catalog for the service and automatically adding the notify
relationship.

resolves #502
resolves #495
closes #653

(GH-388) Simplify class notifications

…-enterprise

(#495) Notify Service[sensu-enterprise] from Sensu::Check resources

Fixed bug where sensu::check was not notifying the enterprise service.