fix #594: re-state RemoteName in Level 8.6c to avoid Studio Pro Integration pane NRE

`create or modify external entity` overwrites `RemoteEntityName` (BSON field
`RemoteName`) with the empty string when the `RemoteName` property is
omitted from the statement (see mxcli#594). Level 8.6c was relying on
preservation of the value set by 8.6a/8.6b, but the resulting BSON ended up
with `RemoteName: ""`. Studio Pro's Integration Pane visualiser then NREs
in `ODataRemoteEntitySource.get_RemoteId()` with
`ArgumentNullException("EntityTypeName")` because the C# property aliases
the BSON `RemoteName` field.

Repeat `RemoteName: 'Account'` in 8.6c. The underlying executor bug is
tracked separately in #594 and will be fixed in its own PR; this commit
keeps the example file usable today.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: ako

mdl-examples/doctype-tests/10-odata-examples.mdl

@@ -332,11 +332,19 @@ from odata client OdTest.SalesforceAPI
  * Level 8.6c: Create external entity with AllowCreateChangeLocally flag
  * Enables local creation/changes for the entity, mirroring Studio Pro's
  * "Allow creating and changing locally" checkbox on external entities.
+ *
+ * RemoteName must be repeated here because `create or modify external entity`
+ * currently overwrites omitted properties with empty strings rather than
+ * preserving the existing value. Without `RemoteName: 'Account'`, the BSON
+ * ends up with `"RemoteName": ""`, which Studio Pro's Integration Pane
+ * visualiser cannot render (NRE in ODataRemoteEntitySource.RemoteId,
+ * mxcli#594).
  */
 create or modify external entity OdTest.RemoteAccount
 from odata client OdTest.SalesforceAPI
 (
   EntitySet: 'Accounts',
+  RemoteName: 'Account',
   Countable: Yes,
   Creatable: Yes,
   Deletable: No,