Handle RUN->ASSOC->RUN transition correctly, as in not trigger a firmware error. Convert if statements to a switch statement while I'm here.
Handle RUN->ASSOC->RUN transition correctly, as in not trigger a
firmware error. Convert if statements to a switch statement while
I'm here.

Tested by:	Benjamin Kaduk <kaduk at mit.edu>
MFC after:	2 weeks

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase