Handle untranslated tabs more gracefully in discopower-module

We no longer test on HHVM

This commit adds the ability to override the defaults in the generated SP metadata for SLO Location and ACS endpoints. This is necessary for my use case as I have additional ACS endpoints to publish in my metadata beyond the generated ones as well as a custom SLO handler that I need to direct my users to. If unset in the config, it uses the defaults as before.

Stream wrappers were assumed to be relative paths. When using a stream wrapper (e.g. s3://) it was appended to the given base path.

Silence scrutinizer

Make the module-discopower twig template usable

Remove the inline javascript from discopower-module

We'd like to stick with echo throughout the project

Fix logic error in UIInfo generation

* Fix discopower tabs

* Remove duplication of search prototype

Discopower fixes

Also move the templates to the "saml" module, since they belong in there.