Fix _update_volume_stats typos

Fix _update_volume_stats typos in 'cinder/volume/driver.py' and
'cinder/volume/drivers/eqlx.py'.
'_update_volume_status' to '_update_volume_stats'

Change-Id: I0642bdb911ca72517ed655f795e0055f4c4654b8
Closes-Bug: #1254978
Remove unused import and CinderNode sqlalchemy model

Class CinderNode is never used,
attribute_mapped_collection from sqlalchemy.orm.collections imported but unused.

Change-Id: I5d72aaf0922eab001f2db5b884b65632481df937
Use assertAlmostEqual instead of failUnlessAlmostEqual in unit tests

The method failUnlessAlmostEqual has been deprecated since python 2.7.
http://docs.python.org/2/library/unittest.html#deprecated-aliases
Also in Python 3, a deprecated warning is raised when using
failUnlessAlmostEqual therefore we should use assertAlmostEqual instead.

Change-Id: Ic9947028afdb5b1ba8f19103018a6f1bc3fc551f
Closes-Bug: #1257068
Removes dublicated assert from test_migrations.py

Change-Id: I1f05a0a79827c50d4d826207fafd7330dc89c308
Imported Translations from Transifex

Change-Id: Ia998d21f646311717eda6301be51ec8bf1cb7034
Merge "Fix _update_volume_stats typos"
Fix typo in cinder

tranfers -> transfers
recurse -> recursive
satisified -> satisfied

There are other typos will be fixed in Oslo. The commit is:
https://review.openstack.org/#/c/59319/

Change-Id: I6fc2be0414962f456a827d294e258637af665524
Closes-Bug: #1255908
Merge "Fix typo in cinder"
Merge "Removes dublicated assert from test_migrations.py"
Merge "Remove unused import and CinderNode sqlalchemy model"
Merge "Use assertAlmostEqual instead of failUnlessAlmostEqual in unit tests"