Proper password & timeout settings

This pull request aims to provide two changes

* Change 1 : Currently, the `pacemaker::corosync` `$hacluster_pwd` needs to be set manually in the `params.pp` file, there is no way to specify it via the module parameters, the first commit changes that.

* Change 2 : Sometime, one might want to timeout early, or earlier, by parametrizing the `auth-successful-across-all-nodes` timeout settings it is made available.