Ceph

This tracker is a result of several weeks/months of teuthology tests for EC, running in a branch where the optimised EC is always on.

The commits themselves describe the individual problems that are being fixed and each fix is relatively self contained. Where multiple attempts at a fix were made, these have been squashed, but largely each commit reflects the result of a teuthology test failure.

There is one commit which is a collection of cosmetic/debug/typos, rather than spreading these out over other commits.