Testing MergePatientData Module

Here are my thoughts.

Since we are not using REST injections, we should export all the Concept data. But while importing, we first make a sanity check to see whether it already exists before we Merge a Concept otherwise I don’t see away to distinguish between Customized Concepts and General Concepts. But Exporting Concepts makes the encrypted file extremely large so we should fix

cc: @ssmusoke, @dkayiwa