acu182180 - handle resource not found error, if rightscale platform does not support user metadata, and increase default TIMEOUT
acu182180 - add retry on errors, so instance has a chance to become operational after some time.
Merge pull request #503 from rightscale/ivory_14_23_acu182180_allow_instance_to_boot_on_existing_platform

acu182180 - handle resource not found error, if rightscale platform does...