pinned apps to support wildcard globs

[johrstrom]

Router#pinned_apps now supports glob style wildcards like sys/* and
sys/bc_desktop/* (usr/ and dev/ included). This also adds public Router#apps
methods to be possibly useful in the future.

This also adds a OodApp#has_sub_apps? api to determine if an app
in fact has valid sub apps for showing the subapp in the pinned
apps menus.

I can comment in the tickets where behaviour is defined more specifically, but basically here are a few common use cases for this:

pinned_apps
   # get all the system and usr apps
   - "sys/*"
   - "usr/*"

   # show all the subapps for sys/bc_desktop
   - "sys/bc_desktop/*"

   # get all the apps from a specific usr share location
   - "usr/some_user/*"

[ericfranz]

https://github.com/OSC/ondemand/pull/898/files#diff-60fef4a9a6a3bd5d06e005f9d166e5fb2522e5a740569fd3402cbe1c0e322213R4-R16 is duplicate of

ondemand/apps/dashboard/app/controllers/application_controller.rb

Lines 29 to 39 in e25637a

	def sys_apps
	@sys_apps ||= SysRouter.apps
	end
	def dev_apps
	@dev_apps ||= ::Configuration.app_development_enabled? ? DevRouter.apps : []
	end
	def usr_apps
	@usr_apps ||= ::Configuration.app_sharing_enabled? ? UsrRouter.all_apps(owners: UsrRouter.owners) : []
	end

To remove this duplication I would instead do this:

1. add ApplicationController#all_apps which does sys_apps + usr_apps + dev_apps
2. change Router.pinned_apps to accept 2 arguments: (tokens, all_apps)
3. add ApplicationController#pinned_app_group which does OodAppGroup.groups_for(apps: Router.pinned_apps(Configuration.pinned_apps, all_apps))

[johrstrom]

Done in 5059010. I had to rebase off of the current master because I removed the helper pinned_apps? because @pinned_apps is a member variable now of the controller now.