Bug 1068025 - AWS AMIs should use LVM for their root device.

* Simpplify manage_instance_storage.py
* Get rid of lvm-init entries in puppet
* Do not install manage_instance_storage.py on Ubuntu (not used there)
Bug 1047207: update dependency free version of hgtool. r=rail
Bug 1052544 - Add mulet to linux passwords, r=jlund
Bug 1069360: update mig-agent; r=dustin
Bug 1067951: fix typo, set relayhost so that error emails are delivered; r=pmoore