Migrate the remaining (standalone) test/ext tests to pytest
Enable the test/ext/conftest.py collector to allow pytest to handle
all of the test/ext standalone tests too.
Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Reviewed-by: Rob Browning <rlb@defaultvalue.org>
[rlb@defaultvalue.org: show the pytest invocations; switch to use
test/ext/conftest.py collector; use the release mark in check and
distcheck; augment commit message; augment the information in
HACKING] Signed-off-by: Rob Browning <rlb@defaultvalue.org> Tested-by: Rob Browning <rlb@defaultvalue.org>