Routing Improvements: User Queue Level Routing Support

Support Routing to cluster with the least queue for the User, fallback to existing Cluster Queue based Routing approach if user level queue size are equal/no-queue.

New version of apis for presto resource groups and selectors

For presto backends with multiple backed resource group and selector databases, we add the ability to the apis to query, create and update resource groups and selectors for different presto backend databases

Alerting improvement

Improves message for alerting

Improved unified admin ui

• Improved unified admin ui
• Added mysql dependency in pom.

1.6.3

Release 1.6.3 (#71)

* Release 1.6.3

* adding unit test and cache control config

Presto gateway HA

• Gateway HA implementation

1.6.1

• Works with pestosql/presto
• Added feature routingGroups to be able to route between multiple groups of cluster
• Added SSL support for router
• bug fix related to re-wrapping request object