Existing 16.01 stable branch

[gnuoy, r=thedac] Fix api-paste.ini for mitaka

[1chb1n, r=gnuoy] Liberty amulet tests and amulet fixes

[gnuoy,trivial] Pre-release charmhelper sync to pickup leadership ele…

…ction peer migration fix

[gnuoy,trivial] Pre-release charmhelper sync