FairMQ: Add static plugin mechanism

* Add skeleton for Take/ReleaseControl API
* Add skeleton for control_static builtin plugin

fairmq/test/plugins/_plugin_manager_prelink.cxx

@@ -0,0 +1,26 @@
+/********************************************************************************
+ *    Copyright (C) 2017 GSI Helmholtzzentrum fuer Schwerionenforschung GmbH    *
+ *                                                                              *
+ *              This software is distributed under the terms of the             *
+ *              GNU Lesser General Public Licence (LGPL) version 3,             *
+ *                  copied verbatim in the file "LICENSE"                       *
+ ********************************************************************************/
+
+#include <gtest/gtest.h>
+#include <fairmq/PluginManager.h>
+
+namespace
+{
+
+using namespace fair::mq;
+using namespace std;
+
+TEST(PluginManager, LoadPluginPrelinkedDynamic)
+{
+    auto mgr = PluginManager{};
+
+    ASSERT_NO_THROW(mgr.LoadPlugin("p:test_dummy"));
+    ASSERT_NO_THROW(mgr.LoadPlugin("p:test_dummy2"));
+}
+
+} /* namespace */