Update FairMQStateMachine & introduce FairMQChannels

Organize sockets as a map of vectors of FairMQChannels.

Update FairMQStateMachine by removing SETTINGINPUT, SETTINGOUTPUT,
BIND and CONNECT states and by adding INITIALIZING_TASK, RESETTING_TASK
and RESETTING_DEVICE states. Run states functions in their own thread.

fairmq/prototest/FairMQBinSampler.cxx

@@ -35,7 +35,6 @@ FairMQBinSampler::~FairMQBinSampler()
 
 void FairMQBinSampler::Init()
 {
-    FairMQDevice::Init();
 }
 
 void FairMQBinSampler::Run()

fairmq/prototest/FairMQProtoSampler.cxx

@@ -37,7 +37,6 @@ FairMQProtoSampler::~FairMQProtoSampler()
 
 void FairMQProtoSampler::Init()
 {
-    FairMQDevice::Init();
 }
 
 void FairMQProtoSampler::Run()