Squashed 'node_mapper/nomadic_recording_lib/' changes from 9abcd90..88c0a9f

88c0a9f new script to simplify removal of ssh hosts whose host keys change periodically
4b8c2b2 bug fixes
e444acb added 'own_callbacks' to fire before others (same functionality as 'Properties')

git-subtree-dir: node_mapper/nomadic_recording_lib
git-subtree-split: 88c0a9ff1063fc3501261482a7ec9638e0701541
Merge commit 'aa08a2a83ef901807feee54889f6ec66f3b0e239'