Removed cherry pick for heat templates

The heat templates change[1] merged and so the cherry pick
was removed.

[1] https://review.openstack.org/#/c/123713/
Merge pull request #76 from Ladas/master

Overcloud update using Tuskar
add cherry pick for dib to install lsb package
Calling tuskar properly

Default version was fixed in client, we don't need to
specify it.
Tuskar was put to bin path, so we don't need to activate
venv. This was also breaking the script in package based deploy.