remove dns override

The dns settings can be overridden in the openstack
tenant subnetwork settings

Change-Id: I36e3d012e5b28fa953599c0c0828bda40a67053d
add wait_for_boot variable

Change-Id: Iac4b68a50b6cab4cb149833077f52a5af4c76b70
workaround for config_tempest tool

tempest/tools/config_tempest.py requires all images to be deleted
and m1.nano and m1.micro flavors to be present. The workaround
creates those.

Change-Id: I4fdabfc4dfc702cff1a17bba8b4a31b5a262c1f8
Use config_tempest tool to config tempest

Replaces the packstack config_tempest with the upstream
config_tempest script to generate the etc/tempest.conf.

Since the init.pp script is not run, the changeset also
  - installs additional packages
  - installs and creates virtualenv

Change-Id: Ie768d58285a5b7ca20457f1348aae3124a8a0e95
aio: workaround for supporting config_tempest

Change-Id: Ic3521c2633a60a8ad401347e33065d3f9e6416da
tempest: installs dependencies tagged tempest_setup

Change-Id: Iec24aa782f95d5b6ba13f4b97b4fbabaa9fc4a52
settings: adds tempest.repo config variable

Change-Id: I0a9df64cd999efd20dad4eade7b5e3dff1af2a86
runs config_tempest workaround by default

Change-Id: Idfd1f02912a35a1d38f3efce225795f615a3e345