Rollback doesn't work with liquibase-mongodb-4.0.0.2 extension

[szandany]

When rolling back a changeSet, the corresponding data set (“row”) in the DATABASECHANGELOG Collection (“table”) will be removed. However, the object will NOT be rolled back.

I used the changeLog from here:
https://github.com/liquibase/liquibase-mongodb/blob/main/src/test/resources/liquibase/ext/changelog.create-collection.test.xml

STR

1. Deploy the changeLog
2. Run liquibase update
3. Run liquibase rollbackCount 1
5. Run liquibase update again

Actual result:
The changeSet will fail with the message "collection already exists"

Expected result
The update should have been successful
The collection should have been dropped during the rollback

┆Issue is synchronized with this Jira Bug by Unito

[mmarcon]

I also tested with explicit rollbacks (see my test here: https://github.com/mmarcon/liquibase-mongo-docker/tree/master/example/changelog) and it didn't seem to do anything.

[alexandru-slobodcicov]

PR raised #54, please test from your side