Add a few integration tests #2
Description
Originally reported by: visheshd (Bitbucket: visheshd, GitHub: visheshd)
Specially for this change here https://bitbucket.org/causecode/mongo-update-embedded/pull-requests/3/updated-collectionupdate-query/diff#Lgrails-app/services/com/causecode/mongo/EmbeddedInstanceQueueService.groovyT140