fixed getContainerId() function

* since switching to podman builds in the CI, the getContainerId()
  function wasn't working anymore. As per default the hostname of the
  container is the same as the container id, we use the GetHostname()
  function to get the container id inside the container.

src/client/client.go

@@ -288,16 +288,7 @@ func parseWhitespaceDelimitedKeyValueStringList(in string, keys []string) []map[
 }
 
 func getContainerId() (string, error) {
-	data, err := ioutil.ReadFile("/proc/1/cpuset")
+	return os.Hostname()
-	if err != nil {
-		return "", err
-	}
-	lines := strings.Split(string(data), "\n")
-	if len(lines) == 0 {
-		return "", errors.New("Couldn't get docker container id (empty)")
-	}
-	containerId := strings.Replace(lines[0], "/docker/", "", -1)
-	return containerId, nil
 }
 
 func ConvertGroupIdToInternalGroupId(id string) (string, error) {