smoketest: T9218: wait for commit lock before cli_set/*_delete/*_discard

cli_commit() already busy-waits for the commit lock to clear before committing,
since a concurrent process can still hold it open for a moment.

cli_set()/cli_delete() had no such guard, so a set/delete issued right after
a commit could race against that lingering lock and fail with a generic
"Set failed"/"Delete failed" ConfigSessionError.

This caused the intermittent test_bgp_27_route_reflector_client failures, whose
set/commit/discard loop hammers the session tightly enough to hit the race.

0 files changed, 0 insertions, 0 deletions