signaling: added new inprocess backend for testing

Signed-off-by: Steffen Vogel <post@steffenvogel.de>

pkg/signaling/inprocess/backend_test.go

@@ -0,0 +1,13 @@
+package inprocess_test
+
+import (
+	"testing"
+
+	"riasc.eu/wice/internal/test"
+
+	_ "riasc.eu/wice/pkg/signaling/inprocess"
+)
+
+func TestBackendInProcess(t *testing.T) {
+	test.TestBackend(t, "inprocess")
+}