Fix variable typo of use_syslog in lib/tempest

TEMPEST_CONF is not set but used it. As a result the meaningless file
'DEFAULT' is created. So this commit fixes to use proper variable name.

Closes-bug: #1394969
Change-Id: If6e58f269319df3c4f71b4fc13aa855c63f7e3a3
Add tooz support from Oslo

Change-Id: I4ccf4bf08e10c0ba651f973aa62562af85ea0f19
XenAPI: Add another plugin directory

Buildroot on 64-bit systems may use /usr/lib64 to store the XAPI plugins
Add this as an option to search for.

The list is getting of acceptable paths is getting longer but some work is going
on in XAPI to allow us to query for this path, which will mean we can get
rid of this list in future.

Change-Id: I79aafb6a86032c7ab04937c9e9bec08661ecdefa
Merge "Add tooz support from Oslo"
Merge "Fix variable typo of use_syslog in lib/tempest"
Merge "XenAPI: Add another plugin directory"
Merge branch 'master' of https://github.com/openstack-dev/devstack