rework server startup.  add daemon module to make a daemon process and keep track of it.  use signals to indicate stop/kill/reload to server.  fix validation.cfg.  add some extra logging options.  add some tests of iceprod_server.py
rework server startup.  add daemon module to make a daemon process and keep track of it.  use signals to indicate stop/kill/reload to server.  fix validation.cfg.  add some extra logging options.  add some tests of iceprod_server.py

WIPACrepo/iceprod,WIPACrepo/iceprod,WIPACrepo/iceprod,WIPACrepo/iceprod