Remove all mongo dbs except local, admin

removeAllDb.js

// Remove all databases, except local, admin
// on command line: mongo filename.js
const dbs = db.getMongo().getDBNames()

for(var i in dbs){
    db = db.getMongo().getDB( dbs[i] );
    if (db.getName() !== 'admin' && db.getName() !== 'local') 
    {
        print( "dropping db " + db.getName() );  
        db.dropDatabase();
    }
}