If a deployer installs AIDE the first time they apply the role
without initializing AIDE and they want to initialize it later,
the handler that does the initialization never fires.
This patch does a few things:
- Ensures AIDE initialization if the initialize_aide bool is True
- Doesn't intialize the AIDE db if it already exists
- Moves the new db into place on Red Hat systems
- Moves the AIDE tasks into its own file with tags
- Prevents AIDE from trawling through /var
Closes-bug: 1616281
Change-Id: I85d65738fde064b06b1147c529b22c3f44a33e94
578ce32998