Fixed local IDs loss on message type revert.

[RoSk0]

Fixing #103 .

[amitaibu]

We are using features and never came across this problem. What are the steps to reproduce?

[RoSk0]

Steps to reproduce:

• Create couple message types and export those to feature
• Add entity reference field pointing at message type to node
• Create a node with entity reference field field in
• Change message text in referenced message type
• Revert feature with modified message type
• Check node created previously

Expected result: reference data remains
Actual result: reference data lost

[amitaibu]

Just out of curiosity what's the use case - why does the node reference the message type?

[RoSk0]

In reality this was contacts and this reference is used to override message type set for the contact type, default one.