Stop service first on cleanup

Signed-off-by: walteryang <walteryang47@users.noreply.github.com>
Add ovirt-engine's jboss modules to classpath

This is a workaround as ovirt-engine's jboss modules contains
postgresql jdbc driver

Signed-off-by: walteryang <walteryang47@users.noreply.github.com>
Create user 'engine' if not exist

Because postgresql using ident authentication for local connections
by default, we need the user to create the schema during setup

Signed-off-by: walteryang <walteryang47@users.noreply.github.com>
Update pg_hba.conf for md5 authentication of db connection

Signed-off-by: walteryang <walteryang47@users.noreply.github.com>