[PDI-12155][TEST]: Error when saving a transformation with MongoDB Output step into Kettle Database Repository

There are unit tests for the fix.
[PDI-12155]: Error when saving a transformation with MongoDB Output step into Kettle Database Repository

There is a fix.
[TEST]: Two tests are failed because encoder in Encr class was not initialized before starting of the tests

During processing XML for "mongo_password" tag we use Encr.encryptPasswordIfNotUsingVariables( getAuthenticationPassword() ) ) method.
But there is no any initialization of Encr in the test. As result there is NullPointerException.
Merge pull request #71 from TatsianaKasiankova/PDI-12155

PDI-12155:  Error when saving a transformation with MongoDB Output step into Kettle Database Repository