Instead of making the function a class member, make it an instance
member because (1) it is more aligned with other functions, notably,
run(), and (2) especially for RemoteCmd() it can be faster, as
successive exec_script() calls do not require a new SSH connection.
In various places, e.g., during initialization (before deployment), we
use the name of the CN object, previously including the IP address.
However, the IP might not be available (because the CN is not deployed),
so we would get warnings at this stage. Avoid this by not looking up the
IP.
There is now one place where we have to look up the IP address
separately.
Also, the exception in initialization might be misleading if we used
{self}, because we complain about no node being present, but the {self}
would include a non-existing node name => do not use it.
This adds a helper class to manage various core networks in the CI
testing framework. Specifically, it reads from a YAML file information
such as a node, (un-)deployment script (file), log collection
instructions, etc., in order to allow a common interface to be used to
deploy and undeploy various core network implementations.
This commit adds the class (in cls_corenetwork.py) as well as tests for
this class.
Robert Schmidt