Change the current gosdn plugin implementation from Go's internal plugin system to hashicorp's go-plugins

Description

Related Issue

Motivation and Context

How Has This Been Tested?

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.

controller/api/initialise_test.go

@@ -20,8 +20,8 @@ import (
 	eventservice "code.fbi.h-da.de/danet/gosdn/controller/eventService"
 	"code.fbi.h-da.de/danet/gosdn/controller/interfaces/networkdomain"
 	"code.fbi.h-da.de/danet/gosdn/controller/interfaces/networkelement"
+	"code.fbi.h-da.de/danet/gosdn/controller/interfaces/plugin"
 	"code.fbi.h-da.de/danet/gosdn/controller/interfaces/rbac"
-	"code.fbi.h-da.de/danet/gosdn/controller/interfaces/southbound"
 	"code.fbi.h-da.de/danet/gosdn/controller/mocks"
 	nbi "code.fbi.h-da.de/danet/gosdn/controller/northbound/server"
 	"code.fbi.h-da.de/danet/gosdn/controller/nucleus"
@@ -59,7 +59,7 @@ const mneID = "7e0ed8cc-ebf5-46fa-9794-741494914883"
 var pndStore networkdomain.PndStore
 var userService rbac.UserService
 var roleService rbac.RoleService
-var sbiStore southbound.Store
+var pluginStore plugin.Store
 var lis *bufconn.Listener
 var pndUUID uuid.UUID
 var sbiUUID uuid.UUID
@@ -95,7 +95,6 @@ func bootstrapUnitTest() {
 	eventService := eventservice.NewMockEventService()
 
 	pndStore = nucleus.NewMemoryPndStore()
-	sbiStore = nucleus.NewMemorySbiStore()
 	userService = rbacImpl.NewUserService(rbacImpl.NewMemoryUserStore(), eventService)
 	roleService = rbacImpl.NewRoleService(rbacImpl.NewMemoryRoleStore(), eventService)
 	if err := clearAndCreateAuthTestSetup(); err != nil {
@@ -123,12 +122,12 @@ func bootstrapUnitTest() {
 		},
 	})
 
-	plugin := &mocks.Plugin{}
+	pluginMock := &mocks.Plugin{}
 
 	mockNetworkElement := &mocks.NetworkElement{}
-	mockNetworkElement.On("Plugin").Return(plugin)
+	mockNetworkElement.On("Plugin").Return(pluginMock)
 	mockNetworkElement.On("ID").Return(mneUUID)
-	mockNetworkElement.On("GetModel").Return(plugin.Model())
+	mockNetworkElement.On("GetModel").Return(pluginMock.Model())
 	mockNetworkElement.On("Name").Return("openconfig")
 	mockNetworkElement.On("TransportAddress").Return("127.0.0.1:6030")
 	mockNetworkElement.On("GetMetadata").Return(conflict.Metadata{ResourceVersion: 0})
@@ -172,6 +171,9 @@ func bootstrapUnitTest() {
 	routeStore := store.NewGenericStore[routingtables.RoutingTable]()
 	routeService := routingtables.NewRoutingTableService(routeStore, nodeService, portService, eventService)
 
+	pluginStore = nucleus.NewMemoryPluginStore()
+	pluginService := nucleus.NewPluginService(pluginStore, eventService)
+
 	northbound := nbi.NewNBI(
 		pndStore,
 		userService,
@@ -182,6 +184,7 @@ func bootstrapUnitTest() {
 		portService,
 		routeService,
 		appService,
+		pluginService,
 		rpb.NewPluginRegistryServiceClient(&grpc.ClientConn{}),
 		csbi.NewCsbiServiceClient(&grpc.ClientConn{}),
 		func(u uuid.UUID, c chan networkelement.Details) {},