If LOG_DIR environment variable is set, create report there.
If it is not set, create the report in 'a11y/'.
Bug: T301184
Change-Id: I74fa6e8ee59d43e5a6e57083999107ac27446a62
The report was created in log/a11y folder until now. Looks like Jenkins
expects it to be in log folder.
Bug: T301184
Change-Id: I9926e7446e4fc86526dab963066511bf8da2271e
This makes built assets available in jenkins,
Also addresses miscellaneous feedback relating to configuration
variable name and track topic name.
Change-Id: Ic70d517eba96aab6512a96ea19d6be56b3664871