Create and Update bucket sending unecessary fields to server

Upon creating a bucket the SDK sets all non-optional bool fields in BucketSettings to false by default and sends them, it should only be sending the necessary fields unless otherwise specified, i.e. the bucket name and ram quota. In particular, it seems to be setting the replicaIndexes to false by default, which if unspecified, the server sets to true.

Likewise updateBucket, unless otherwise specified, the SDK will reset these values to the defaults it sets - e.g. setting the ramQuotaMB to 100.

This change may require some additional work in the wrappers.