When users open the DMN editor with an imported file+ imported nodes, they must be able to see these nodes on read-only mode.

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Assets:

• daniel1.dmn
• daniel2.dmn

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This task comprehends:

• Read imported nodes in the "daniel2.dmn", and put them into the canvas by consuming a mocked service class (the "real class" will be implemented in the DROOLS-3831) to fill the node information;
• Create the new imported nodes in the canvas (The DROOLS-3832 will address this item)
• Persist imported nodes info properly in the DMN file (when users save it)
• Keep these imported nodes on read-only mode
• Keep the properties panel correctly updated (The DROOLS-3830 will address this item)

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Acceptance criteria:

• Open the "daniel2.dmn"
• See the imported nodes from the "daniel1.dmn"
• Try to change the name of the node (this should not be allowed, since the node must be on read only mode)
• Check the properties panel properties