Infinite busy waiting for lost event (#31)

* Close evaluation stream for Nomad Job creation
 when set event handler have been finished

* Remove evaluation event stream requests
by handling the events via the main Nomad event handler.

internal/environment/manager_test.go

@@ -232,7 +232,7 @@ func TestNomadEnvironmentManager_List(t *testing.T) {
 }
 
 func mockWatchAllocations(apiMock *nomad.ExecutorAPIMock) {
-	call := apiMock.On("WatchAllocations", mock.Anything, mock.Anything, mock.Anything)
+	call := apiMock.On("WatchEventStream", mock.Anything, mock.Anything, mock.Anything)
 	call.Run(func(args mock.Arguments) {
 		<-time.After(10 * time.Minute) // 10 minutes is the default test timeout
 		call.ReturnArguments = mock.Arguments{nil}