chore: upgrade embed.mongo to 1.43
chore: set EmbeddedMongo Version to 2.4, 2.4.5 is deprecated
fix: set outputEncoding UTF-8 to remove a maven encoding warning
refactor: remove obsolete TestEmbedMongo
refactor: simplify EmbedMongo and remove its singleton pattern
refactor: rename EmbedMongo to EmbeddedMongo