Updated sessionKey to session_key in the endpoint response

Author: Fergal Gribben

README.md

@@ -415,7 +415,7 @@ $ curl \
 ```json
 {
   "data": {
-    "sessionKey": "9:720D9B92D50D4F7C404C8C412BEB73B47E0A2FA2E822C13201A79D5A2694F9F5"
+    "session_key": "9:720D9B92D50D4F7C404C8C412BEB73B47E0A2FA2E822C13201A79D5A2694F9F5"
   }
 }
-```
+```

gpg/path_show_session_key.go

@@ -123,7 +123,7 @@ ParsePackets:
 
 	return &logical.Response{
 		Data: map[string]interface{}{
-			"sessionKey": sessionKey,
+			"session_key": sessionKey,
 		},
 	}, nil
 }

gpg/path_show_session_key_test.go

@@ -49,7 +49,7 @@ func TestGPG_ShowSessionKey(t *testing.T) {
 		if resp == nil {
 			t.Fatalf("no name key found in response data %#v", resp)
 		}
-		plaintext, ok := resp.Data["sessionKey"]
+		plaintext, ok := resp.Data["session_key"]
 		if !ok {
 			t.Fatalf("no name key found in response data %#v", resp.Data)
 		}