ctdb-tests: Use ctdb_get_all_pnns()
The nested, arbitrary use of onnode can cause messages from ssh on
stderr to appear in the node list:
Getting list of nodes...
Output of "onnode -pq all ctdb pnn | grep '^[0-9][0-9]*$'":
Warning: Permanently added '10.0.0.72' (RSA) to the list of known hosts.^M
Warning: Permanently added '10.0.0.75' (RSA) to the list of known hosts.^M
Warning: Permanently added '10.0.0.73' (RSA) to the list of known hosts.^M
Warning: Permanently added '10.0.0.74' (RSA) to the list of known hosts.^M
1
0
3
2
Create/wipe test database rec_test.tdb
Failed to execute "Permanently added '10.0.0.72' (RSA) to the list of known hosts.^M ctdb attach rec_test.tdb" on node(s) "Warning:"
Invalid <nodespec>
Avoid that by using an existing function that does not nest ssh uses.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>