add in erb for handling git ini files

Signed-off-by: Andrew Grimberg <agrimberg@linuxfoundation.org>
put the erb in the proper place

Signed-off-by: Andrew Grimberg <agrimberg@linuxfoundation.org>
fix up the erb syntax

Signed-off-by: Andrew Grimberg <agrimberg@linuxfoundation.org>
Create config files and do initialize

We create the gerrit.config and secure.config files as well as do the
gerrit initialization. This does not take into account MySQL or
PostgreSQL databases yet and is strictly the basics / uses the built in
H2 database

Signed-off-by: Andrew Grimberg <agrimberg@linuxfoundation.org>