[systest] Change simple sleep in 'setup_environment' method to wait

[Andrey Sledzinskiy]

I think we should change 'setup_environment' method in fuelweb_test/models/environment.py
We use simple sleep after starting admin node
self.get_virtual_environment().start(self.nodes().admins)
        # update network parameters at boot screen

        time.sleep(float(settings.ADMIN_NODE_SETUP_TIMEOUT))

        admin.send_keys(self.get_keys(admin))
        # wait while installation complete
        admin.await(self.admin_net, timeout=10 * 60)

It makes possible situation when sleep timeout isn't enough for starting admin node and settings from here admin.send_keys(self.get_keys(admin)) goes nowhere and it will cause setup failure

1. Change sleep on wait for condition - can be checking online state of admin node
2. Add logs

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/109277

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/109277
Committed: https://git.openstack.org/cgit/stackforge/fuel-main/commit/?id=d821b6db1d82094021a084f7c04bf5a81dcbb75c
Submitter: Jenkins
Branch: master

commit d821b6db1d82094021a084f7c04bf5a81dcbb75c
Author: Kirill Omelchenko <email address hidden>
Date: Thu Jul 24 15:29:01 2014 +0300

    Change sleep method to wait in 'setup_environment'

    Changed simple sleep timeout to wait.

    Change-Id: I3c95490fdd425b409292ce9550d3817d22c2caca
    Closes-Bug: #1319071

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: stable/5.0
Review: https://review.openstack.org/112833

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/112833
Committed: https://git.openstack.org/cgit/stackforge/fuel-main/commit/?id=5f5dcd04a296387baff66550daa9294445610e33
Submitter: Jenkins
Branch: stable/5.0

commit 5f5dcd04a296387baff66550daa9294445610e33
Author: Kirill Omelchenko <email address hidden>
Date: Thu Jul 24 15:29:01 2014 +0300

    Change sleep method to wait in 'setup_environment'

    Changed simple sleep timeout to wait.

    Change-Id: I3c95490fdd425b409292ce9550d3817d22c2caca
    Closes-Bug: #1319071
    (cherry picked from commit d821b6db1d82094021a084f7c04bf5a81dcbb75c)