qa: Update data pool ID for vxattrs test

Signed-off-by: John Spray <john.spray@redhat.com>
mon: Set crash_replay_interval automatically

Signed-off-by: John Spray <john.spray@redhat.com>
qa: add a check for crash_replay_interval autoset

... that after a fs new on fresh pools, crash_replay_interval
is set to the default on the data pool.

Signed-off-by: John Spray <john.spray@redhat.com>
mon/MDSMonitor: EC check in 'fs new' like newfs

Signed-off-by: John Spray <john.spray@redhat.com>
qa: update cephtool EC pools test to respect IDs

...of data and metadata pools which are no longer
constant.

Signed-off-by: John Spray <john.spray@redhat.com>
mds: Update default FS name

From 'default' to 'cephfs' so that it looks
at least vaguely meaningful.

Signed-off-by: John Spray <john.spray@redhat.com>
Merge pull request #2054 from ceph/wip-fs-cmds-oops

Apply some accidentally-dropped commits from the wip-fs-cmds branch to be a little friendlier and pass tests.

Reviewed-by: Greg Farnum <greg@inktank.com>