Parse hw_property args in acloud create cmd

Bug: 112685015
Test: m acloud && m acloud_test && acloud_test
acloud create --hw_property cpu:2,resolution:1280x720,dpi:240,memory:2g,disk:4g
acloud create --local_instance --local_image --hw_property cpu:2,resolution:1280x80,memory:4g

Change-Id: I07002c7aa8ba0ac90503aa28dab894729b1f29a6
11 files changed