autotest/virt-test — pull request #461 by clebergnu (2013-05-23 11:22:12+00:00)
Title: common.py: check the autotest client library directory

When relying on the environment variable $AUTOTEST_PATH to locate
the autotest libraries, we only check if the variable is set. This
adds another sanity check, if the client library directory actually
exists.

This prevents an ImportError exception to be thrown with no clear
error message.

Signed-off-by: Cleber Rosa