Support for secure socks proxy (#1650)

* Enables PDC for zabbix datasource

* 4.4.0

* Updating CHANGELOG

* Updating CHANGELOG

* Updating CHANGELOG

pkg/datasource/datasource_test.go

@@ -1,6 +1,7 @@
 package datasource
 
 import (
+	"context"
 	"testing"
 
 	"github.com/grafana/grafana-plugin-sdk-go/backend"
@@ -58,7 +59,7 @@ func TestZabbixBackend_getCachedDatasource(t *testing.T) {
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
 			ds := NewZabbixDatasource()
-			got, _ := ds.getDSInstance(tt.pluginContext)
+			got, _ := ds.getDSInstance(context.Background(), tt.pluginContext)
 
 			// Only checking the URL, being the easiest value to, and guarantee equality for
 			assert.Equal(t, tt.want.zabbix.GetAPI().GetUrl().String(), got.zabbix.GetAPI().GetUrl().String())