CONN-401 consistent thread count filtering

The sub-forum thread filtering excludes `comments_index` rows where
`archived != 0`. This results in inconsistent numbering between the
per forum thread counts and the total thread count displayed at the top
of the page.
update crosswiki indexer to set main_wikia_domain field
CON-1147 | Hubs - fixed lazy loading thumbnails
CON-1147 | Hubs - fixed lazy loading thumbnails
Merge remote-tracking branch 'origin/dev' into CON-1147
Merge remote-tracking branch 'origin/dev' into CON-1147

Conflicts:
	extensions/wikia/ImageLazyLoad/js/ImgLzy.module.js
PLA-1461 make series search to use main_wikia_domain
search also aliases of wiki domains
fix tests
Video (VID-1703): VideoPageTool - updated thumbnail option
Merge pull request #3648 from Wikia/VID-1703

Video (VID-1703): VideoPageTool - updated thumbnail option
Merge pull request #3614 from Wikia/CONN-401

CONN-401 consistent thread count filtering
fix indexer
Startup RL module: cache for 5 minutes only
CON-1121 | HubsV2 old styles cleanup
Merge pull request #3656 from Wikia/startup-module-short-ttl

Startup RL module: cache for 5 minutes only
Merge pull request #3657 from Wikia/CON-1121

CON-1121 | HubsV2 old styles cleanup
change env var to WIKIA_DATACENTER
PLATFORM-3: adjusting dead wiki limits
fix php error when SpecialNewWikis is enabled and updateSpecialPages is run