Update prerequisite packages in development docs

The packages listed for Linux distros are updated to meet the
prerequisites to run the unit tests.

Change-Id: Iedd9e4d04d7700d418ddb07881ac76ad758466cb
Closes-bug: #1367670
Imported Translations from Transifex

For more information about this automatic import see:
https://wiki.openstack.org/wiki/Translations/Infrastructure

Change-Id: Iacc17652260172c2888d71026e316a53e135b9b7
Use oslo.utils

oslo.utils library now provides the functionality previously in
oslo-incubator's excutils, importutils, network_utils, strutils
timeutils, units etc. Some of these outdated modules will still be
around for a while until all other oslo modules that use them have been
updated in future commits.

Change-Id: Idee8600dfe42e5977b8fb824e91afff7e9119981
Switch Cinder to use oslo.concurrency

Let's switch to the newly released oslo library for the
processutils and lockutils. We use the config fixture(s) to
specify disable_process_locking and lock_path in the CONF
variable of oslo.concurrency library for correctly setting the
flags.

Change-Id: Ib8f3aac5449eba66ea84bc5cad8aea061adab276
Merge "Use oslo.utils"
Merge "Switch Cinder to use oslo.concurrency"
Merge "Imported Translations from Transifex"
Merge "Update prerequisite packages in development docs"