CacheTime::mUsedOptions and ParserOutput::mAccessedOptions
do exactly the same thing and has to be merged into a single property.
This patch adds forward-compatibility and needs to be deployed
at least one train before the patch which actually merges the properties.
Change-Id: Ic9d71a443994e2545ebf2a826b9155c82961cb88
Based on Daniel's work at Ia6e70179b7ee5ce4e93888585ccc30d92da165c3
however was changed enough to move into a separate changeset.
More acceptance tests and data will be added in a followup commit.
Bug: T264397
Change-Id: I135187e83cbfa02b97c5656f0752f8bf1ceb58d0
