Merge pull request #35 from v-sirebb/master

Updated SETUP-INSTALL-PACKAGES scripts for Prepared Image
Fix : BVT-VERIFY-DISKSIZE

Fix : the ouput size is just root partition size rather than the
expected whole /dev/sda* size.
Add : Detect "Core OS" distro

Added code to detect Core OS distribution.
Merge pull request #37 from iamshital/master

Add code to detect CoreOS
FIO : added performance test case for Linux on Azure

This test performs fio test on resource disk.
iosize, queue depth, test file size and runtime details are mentioned in
XML file.
Minor Fix
Merge pull request #38 from iamshital/master

FIO : Added performance test for Linux on Azure