Allow to pass run options to daemon with gerrit.sh

Option --slave was the only one supported.

Add support in gerrit.sh to pass run options to daemon, which are read
from container.daemonOpt in gerrit.config. I prefer to add generic
option support as opposed to one option in gerrit.config per option
that the daemon supports.

This commit makes the container.slave option obsolete since it can now
be configured in the run options but kept it for backward compatibility.

Change-Id: Id7b9fafc3df055dc6d9d1ef489e9c87e7ba5e470
2 files changed