The 'pve-configid' format is used for many IDs, for example the names
of resource mappings, but an invalid ID only got rejected with:
invalid configuration ID 'gpu@node1'
which does not tell what is wrong with it, so users had to guess or
look up the regex in the code.
Explain the rules in the error message: an ID must start with a letter,
be at least two characters long and only contain letters, digits, '-'
and '_'. These are the same rules the tooltip of the 'ConfigId'
validation in the web UI lists. Add a test for the message.
Signed-off-by: Michal Fox <me@dualfroz.com>
dualfroz
9373a6089b