Cleanup docstring and print in install_venv_common

This commit cleans up usage in the docstring for:
run_command_with_code() to be more explicit in the description
of where the commands are being run.

It also updates the prints to be consistent in the usage of venv
vs virtualenv.

These changes were recommended in the review for change:
I68fe3449ed0fcc7fdfb84af2dcc77a39ebde7f01

Change-Id: I3cdb3d991503446d37c8fa6a3547585a4f8beb6a
Fix Lack of reconnecting operation when using rabbitmq mirrored queue

On using Mirrored Queue feature in impl_kombu.py, there is a case
that messages are lost because amqp client does not handle exceptions
properly when rabbitmq is dead on the way to wait return value of call().
This patch fix this and enables ampq client reconnecting slave rabbitmq.

Fixes bug 1102051

Change-Id: Ia7a1b9067f7ea4639195a1548de29e0364368e51
Merge "Cleanup docstring and print in install_venv_common"
Merge "Fix Lack of reconnecting operation when using rabbitmq mirrored queue"