m7: move ueventd to m7-common, consolidate init scripts

Change-Id: I6fb54ee13b929a85202e09d08f47de6311b6cfc1
m7: clean up system properties

Change-Id: I85b4a9c16a8b60cdbc858c4a2ba774f675d8ff43
Merge "m7: move ueventd to m7-common, consolidate init scripts" into cm-10.1
Merge "m7: clean up system properties" into cm-10.1