Fix maven classpath resolve failure when multiple entry is given

[kuna]

When maven classpath is resolved, it is being saved to internal DB cache for reuse. However when multiple entity is given, multiple DB records will be created at one transaction, and it is impossible as it contains auto-incremental ID column.

Solution is inserting the records in a batch transaction.

[kuna]

Before the change, the transaction fails because the column id is not usable (not in the result set)

After fix it works saying Adding X files to class path

This fix will give much better supportability for whom using mvn-based repository.