Swift migration:

* log migration stats when done
* http_proxy is not set in environment
Merge pull request #1903 from Wikia/release-194-swift-stats

Swift migration
BAC-861: added avatars to sync between DC
BAC-861: added force parameter
BAC-861: invalid condition
migrateWikisToSwift: support --force flag
Merge pull request #1912 from Wikia/release-194-swift-sync

Swift sync changes
BAC-861: added move option
Merge pull request #1913 from Wikia/release-194-swift-sync2

BAC-861: added move option
BAC-861: add space to --force parameter
BAC-861: use force only in script (don't touch DB query)
Merge pull request #1915 from Wikia/release-194-swift-migration-fixes

Swift migration fixes
Video (vid-996): Ooyala - updated api for checking duplicate video
Merge pull request #1918 from Wikia/vid-996

Video (vid-996): Ooyala - updated api for checking duplicate video
migrateImagesToSwift:  wait a bit to prevent deadlocks
Merge pull request #1927 from Wikia/release-194-sleep-my-friend

migrateImagesToSwift:  wait a bit to prevent deadlocks
DAR-1859 - Don't break everything if Wikia.AbTest is not present
Merge pull request #1933 from Wikia/CE-466-editor-internal-fix

DAR-1859 - Don't break everything if Wikia.AbTest is not present
migrateImagesToSwift: handle read-only wikis
Merge pull request #1949 from Wikia/release-194-swift-read-only

migrateImagesToSwift: handle read-only wikis