further cleanup of sensor definitions scattered all over the code - now pulls everything from definitions

git-svn-id: http://observium.org/svn/observer/trunk@4583 61d68cd4-352d-0410-923a-c4978735b2b8
more duplicate code cleanups in global health pages for sensors

git-svn-id: http://observium.org/svn/observer/trunk@4584 61d68cd4-352d-0410-923a-c4978735b2b8
HAMMERTIME


git-svn-id: http://observium.org/svn/observer/trunk@4585 61d68cd4-352d-0410-923a-c4978735b2b8