Fix disableVm and scheduling iteration concurrency

run disableVm mutually exclusive with scheduling iteration

Shortfall based autoscale up change

Support optional task to autoscale group mapper to optimize scale up triggers based on shortfall analysis based scale up.

AutoScale enhancements, Move to Java 8

Merge pull request #106 from spodila/autoscaleChgs

Autoscale chgs

Fix queue bucket sorting

Fix for incorrect queue bucket sorting resulting from certain scenarios due to changing total resources counts.

Fixes Issue #87

Fixes issue #87

Minor fix to scheduling service

Fix scheduling service to use internal version of task assigner in TaskScheduler.

Change signature of TaskSchedulingService.removeTask

Merge pull request #99 from spodila/chgRmTaskSignature

change signature of TaskSchedulingService.removeTask

Move removeTask function to TaskSchedulingService

The task removal must be moved to taskSchedulingService in order to properly remove from both the queue as well as the internal task tracker in TaskScheduler.

Sample framework that uses new task queues

Merge pull request #97 from spodila/taskQsampleFramework

Sample framework that use new task queues

Minor fix in task scheduling service

Fix task scheduling service to use internal implementations of TaskScheduler.
Create exception objects when throwing instead of reusing an initialized exception for better stack traces.