Close resp body on plugin call error

Signed-off-by: Brian Goff <cpuguy83@gmail.com>
(cherry picked from commit 93ad9c31fce375b29606ea347df28c1205e7cb41)

pkg/plugins/client.go

@@ -122,6 +122,7 @@ func (c *Client) callWithRetry(serviceMethod string, data io.Reader, retry bool)
 
 		if resp.StatusCode != http.StatusOK {
 			b, err := ioutil.ReadAll(resp.Body)
+			resp.Body.Close()
 			if err != nil {
 				return nil, &statusError{resp.StatusCode, serviceMethod, err.Error()}
 			}