Need to remove extra steps from Murano system tests

[Victor Ryzhenkin]

There is some typos in System tests Murano scenario.

Now, scenario looks like this:
        Scenario:
            1. Create cluster. Set install Murano option
            2. Add 1 node with controller role
            3. Add 1 nodes with compute role
            4. Deploy the cluster
            5. Verify Murano services
            6. Run OSTF
            7. Register Murano image
            8. Run OSTF Murano platform tests

Actually, it should looks like this:

        Scenario:
            1. Create cluster. Set install Murano option
            2. Add 1 node with controller role
            3. Add 1 nodes with compute role
            4. Deploy the cluster
            5. Verify Murano services
            6. Run OSTF
            7. Run OSTF Murano platform tests

Also, Murano system test doensn't require Internet conntection and image.
So, we have to fix docstring for this classes.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/170099

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/170099
Committed: https://git.openstack.org/cgit/stackforge/fuel-qa/commit/?id=e582c4d3deab54dc426439b2d3845aaef207477d
Submitter: Jenkins
Branch: master

commit e582c4d3deab54dc426439b2d3845aaef207477d
Author: vryzhenkin <email address hidden>
Date: Thu Apr 2 15:15:33 2015 +0300

    Fix typos in Murano system tests scenarios

    Fixed a few typos in classes and scenarios descriptions

    Change-Id: Ibc1e62d915123283f9d7ee33cad6e9826ece30c9
    Closes-Bug: #1439658