Support creation of .pgpass file

[LongLiveCHIEF]

for gitlab HA installations, there is a .pgpass file that needs to be created on any application_role or pgbouncer_role nodes. Normally this is generated manually by running gitlab-ctl write-pgpass.... command, which creates a file at the userhome for gitlab-consul user (default's to /home/gitlab-consul.

This means we can use a template to create this file and automate this requirement just by having the file present.

• create variable for pgpass_location, defaults to /home/gitlab-consul/.pgpass
• create template for .pgpass.erb
• create variable for pgbouncer_password and inject it into .pgpass.erb

Optional/possibly required:

• make host, database, user, and hostuser template variables for the .pgpass.erb template

The pattern for this file is such:

"${host}:*:${database}:${user}:${pgbouncer_password}

example outcome would be (with default values shown):

127.0.0.1:*:pgbouncer:pgbouncer:Password