Fix handling of root password on non-masters

Previously the root password was not set on slaves,
which meant there was also no /root/.my.conf file,
which prevented slaves from using the custom types
for managing database resources.
Fix collector to match on title instead of name
Replace deprecated method

database_user is deprecated, changed to mysql_user
Various fixes:

change packages to ensure => installed, not latest
remove hardcoded path from nc command for bootstrap
add bind address parameter