Add default_orgname tests


 -- Added "default_orgname" support

In "layouts" key, add

````"default_orgname": "deforg"````

Pedant tests are modified to run both pedant in normal mode, and if ````default_orgname```` is set, to run pedant with ````--use-default-org````
I think that the assumption is that if default_orgname is set in the config, then osc_install would be false.  In the case ocs_install was set to true and default_orgname was set we this resource would fail.  I can see the logic for that, but maybe osc install should just ignore the default_orgname setting if set.