Merge pull request kubernetes-client#1552 from roycaihw/v19a1

Generate v19.15.0a1 client

Merge pull request kubernetes-client#1527 from roycaihw/v18-ga

Release 18.20.0

Merge pull request kubernetes-client#1496 from roycaihw/release-18b1

Release v18.20.0b1

Merge pull request kubernetes-client#1464 from scottilee/release-17.0

Release 17.17.0

Merge pull request kubernetes-client#1449 from scottilee/release-17.0

Release v17.17.0.b1

Merge pull request kubernetes-client#1411 from roycaihw/release-18.0

Release v18.17.0a1

Merge pull request kubernetes-client#1317 from palnabarun/release-17.0

Release v17.14.a1

Merge pull request kubernetes-client#1285 from palnabarun/release-12.0

Release 12.0.1

Merge pull request kubernetes-client#1280 from palnabarun/release-12.0

Update Client 12.0 to stable

Merge pull request kubernetes-client#1235 from palnabarun/release-12.0

Update client to 12.0.0b1