Revert "Register resources with absolute path"

The change broke beta with exception such as:

exception 'MWException' with message
'ResourceLoaderFileModule::readScriptFiles: script file not found:
"/usr/local/apache/common-local/php-master/er/extensions/MwEmbedSupport/MwEmbedModules/MediaWikiSupport/MediaWikiSupport.loader.js"'
in
/data/project/apache/common-local/php-master/includes/resourceloader/ResourceLoaderFileModule.php:574

bug: 50264
This reverts commit aadc1d0dd503ebb30ef4180d75b887c764b75fd3

Change-Id: Ie373d1f407788a8e2456c3d8a34cc79ac9ed8bb6
Merge "Revert "Register resources with absolute path""