Merge pull request grpc#17446 from moriarty/cherry-pick-fix-bazel-0.20

Cherry pick fix bazel 0.20

Merge pull request grpc#17483 from srini100/v1.17.x

bump to v1.17.1

Merge pull request grpc#17426 from srini100/v1.17.x

V1.17.x

Merge pull request grpc#17381 from muxi/v1.17.x

Bump version to v1.17.0

Merge pull request grpc#17319 from stanley-cheung/bump-to-pre3

Bump to v1.17.0-pre3

Merge pull request grpc#17263 from stanley-cheung/bump-to-1-17-pre2

Bump to v1.17.0-pre2

Merge pull request grpc#17246 from muxi/v1.17.x

Bump v1.17.x version to v1.17.0-pre1

Merge pull request grpc#17209 from srini100/v1.16.x

Bump version to 1.16.1

Merge pull request grpc#17130 from srini100/v1.16.x

Bump version to v1.16.1-pre1

Merge pull request grpc#16966 from stanley-cheung/v1.16.x

Bump version to final 1.16.0