Fix tests using multiple controllers (#1734)

The previous PR only initialized plugins if they were required, which
meant that there may not actually be a plugin manager running because a
second node would not actually create the dev database, which is where
the plugin was being added. The assumption that a plugin manager is
running is still a fine one at the moment, but we just need to make sure
it's running in _all_ cases.

internal/servers/controller/testing.go

@@ -20,7 +20,6 @@ import (
 	"github.com/hashicorp/boundary/internal/db"
 	"github.com/hashicorp/boundary/internal/db/schema"
 	"github.com/hashicorp/boundary/internal/gen/testing/interceptor"
-	"github.com/hashicorp/boundary/internal/host/plugin"
 	"github.com/hashicorp/boundary/internal/iam"
 	"github.com/hashicorp/boundary/internal/intglobals"
 	"github.com/hashicorp/boundary/internal/kms"
@@ -492,6 +491,9 @@ func TestControllerConfig(t *testing.T, ctx context.Context, tc *TestController,
 	tc.b.DevOidcAccountId = DefaultTestOidcAccountId
 	tc.b.DevUnprivilegedPasswordAccountId = DefaultTestUnprivilegedPasswordAccountId
 	tc.b.DevUnprivilegedOidcAccountId = DefaultTestUnprivilegedOidcAccountId
+	tc.b.DevLoopbackHostPluginId = DefaultTestPluginId
+
+	tc.b.EnabledPlugins = append(tc.b.EnabledPlugins, base.EnabledPluginHostLoopback)
 
 	// Start a logger
 	tc.b.Logger = opts.Logger
@@ -616,7 +618,6 @@ func TestControllerConfig(t *testing.T, ctx context.Context, tc *TestController,
 		}
 	} else if !opts.DisableDatabaseCreation {
 		var createOpts []base.Option
-		createOpts = append(createOpts, base.WithHostPlugin(DefaultTestPluginId, plugin.NewWrappingPluginClient(plugin.NewLoopbackPlugin())))
 		if opts.DisableAuthMethodCreation {
 			createOpts = append(createOpts, base.WithSkipAuthMethodCreation())
 		}