Check if Upstart exists before blocking the daemon. Not all dpkg based
OS's have Upstart installed so this should help increase compatibility.
Closes-Bug: #1251949
Change-Id: I2dcb1ff3641778b5653ca5762a728398adb57da1
This includes the install-packages implementation for dpkg, apt http proxy
config, daemon blocking and unblocking.
Change-Id: I8f159021d2b223d7003cec067de3aa605ad06974