780df80cfc introduces support for the
OP_MSG protocol. Unfortunately, the upsert and multi options of the
update command still use flagBits to communicate the options, whereas
they must be provided directly into the command document,
alongside the "q" and "v" fields.
This commit:
- introduces a test for a single-document upsert that, if isolated,
succeeds against the reference MongoDB 3.6 container, but fails
against an official 6.0 image.
- provides a patch that sets the appropriate options.
The test is not perfect as the upsert operation is inherently racy and
this difficult to test. A comfortable threadDelay has been inserted as
a workaround to accomodate for medium workloads.
- insertAll should throw an exception if it encounters a document
too big for one message. However all other documents will be inserted.
- slightly edit docs
