determine environment from alias definitions

secop devices are added automatically to the environment if the
appear in the alias_config. secop devices no longer available
are remove from the envrionment list.

+ fix rename nicos_sinq/frappy to nicos_sinq/frappy_sinq

setups/frappy.py

@@ -1,7 +1,7 @@
 description = 'frappy'
 group = 'optional'
 
-modules = ['nicos_sinq.frappy.commands']
+modules = ['nicos_sinq.frappy_sinq.commands']
 
 devices = {
     'temperature': device('nicos.devices.generic.DeviceAlias'),