Travis: enable mongodb service
Travis: enable mongodb service

prolic/DoctrineMongoODMModule,prolic/DoctrineMongoODMModule,doctrine/DoctrineMongoODMModule,doctrine/DoctrineMongoODMModule,doctrine/DoctrineMongoODMModule,Bilge/DoctrineMongoODMModule,Bilge/DoctrineMongoODMModule