promise: move check_free_disk_space promise to promise.plugin
check_free_disk_space is now in promise.plugin, with some improvement. Database connection timeout is now 10 seconds If database is locked, promise will try again 10 times before start to raise error with "database is locked" message.
Showing with 221 additions and 134 deletions
slapos/test/promise/test_check_free_disk.py → slapos/test/promise/plugin/test_check_free_disk_space.py