FIX: many bugs in epics_callbacks
FIX: many bugs in epics_callbacks

Turns out writing code with out testing it is a bad idea!

dchabot/bluesky,ericdill/bluesky,sameera2004/bluesky,dchabot/bluesky,klauer/bluesky,ericdill/bluesky,klauer/bluesky,sameera2004/bluesky