Merge release-1.1 master#768

Merged

hklai merged 6 commits intoistio:masterfrom

hklai:1.1-master

Jan 22, 2019

Commits on Jan 15, 2019

assorted doc updates (#757)
rshriram
authored

Commits on Jan 16, 2019

add optional incremental flag to ResponseSink and ResourceSource services (#762)

ayj
authored and
istio-testing
committed
Add option to select worload using lables for authn policy. (#755)

diemtvu
authored and
istio-testing
committed

Commits on Jan 21, 2019

Locality LB failover api (#760)

hzxuzhonghu
authored and
istio-testing
committed

Commits on Jan 22, 2019