Update for Danube/Newton, support Devstack testing.

Update for Danube/Newton, support Devstack testing.

JIRA: MODELS-23
tacker-setup.sh:
Update comments and usage.
Remove OPNFV-specific env setup, add openrc and Heat host params.
Add OSC setup from github branch.
Install ping in tacker container.
Setup tacker as mysql user vs root.
Move tacker user cleanup to setup() function.
Update git branch to Newton.
Uncomment tox generation of tacker.conf.sample.
Update tacker.conf for newton.
Address tacker bug (?) in vim-config.yaml.
Add more vim-config.yaml fields found to be needed in testing.
Update tacker commands for changes to "--name" parameter.
Move tacker container cleanup to vHello_Tacker.sh.

vHello_Tacker.sh:
Update comments and usage.
Update admin-openrc.sh setup.
Update calls to tacker-setup.sh for new params.
Add TODOs for things.
Improve test for JuJu command use.
Fix bugs in assertion tests.

Add devstack local.conf to utils/devstack

Change-Id: I31fdb6be8f198cc245c259378922650bae095496
Signed-off-by: Bryan Sullivan <bryan.sullivan@att.com>