Extend tests of error cases

- test raising SIGINT in every state
 - test going to Error state from every state
 - add new states (bind/connect) to exception tests

test/CMakeLists.txt

@@ -105,6 +105,8 @@ add_testsuite(Device
     device/_config.cxx
     device/_waitfor.cxx
     device/_exceptions.cxx
+    device/_error_state.cxx
+    device/_signals.cxx
 
     LINKS FairMQ
     DEPENDS testhelper_runTestDevice