tungsten: serve gdash on gdash.wm.o vhost

* Add missing trailing semicolon to nginx config.
* Move deployment::target resource to module from role class.
* Make install_dir default to git-deploy default.

Change-Id: Ic6722abb46853d3bd7d2ac5fee1e93eb062cfd0f
role::ocg: fix typo in config file name

Added in Ied8b5ac3623.

Change-Id: I5725eadf395b79cab02548ab54e4bfc2d1ba2b37
Merge "tungsten: serve gdash on gdash.wm.o vhost" into production
Merge "role::ocg: fix typo in config file name" into production