Added LINPACK Test

1. ICA-LINPACK-TEST.ps1 - Powershell  script to perform LINPACK test.
2. start-linpack-test-in-background.py - Python supporting script.
3. Azure_ICA_all.xml
	a. Added A8 and A9 deployment details.
	b. Added LINPACK test definition.
	c. Created LINPACK-STREAM test cycle.