make the resource_link_title for content_tag launched lti tools correct

fixes PLAT-324

test-plan:
  steps:
    *setup an lti tool as a module item changing the name to be different than the lti tools name
    *launch the lti tool
  result:
    *the resource_link_title value should match the name of the module item

Change-Id: Ifcfa695dd09f693cf4449869052349402168470b
Reviewed-on: https://gerrit.instructure.com/34030
Tested-by: Jenkins <jenkins@instructure.com>
Reviewed-by: Eric Berry <ericb@instructure.com>
QA-Review: Nathan Rogowski <nathan@instructure.com>
Product-Review: Nathan Mills <nathanm@instructure.com>