[DataValues] Separation of resource loader module definitions

* All modules of "DataValues" (not the MW extension) are in "DataValues.resources.php" now
* Other modules which are required by the "DataValues" modules and those specific to the MW
  extension are in "DataValues.resources.mw.php" now.
* Minor cleanup in ValueView extension's resource loader files.

Change-Id: I84704bc26b90f69bf26e938672ef672edad8ba39