Add XenAPI to OpenStack dependencies

This way, the XenAPI package will be mirrored by the OpenStack pypi
mirror, so it could be installed in the gate.

Change-Id: I185f9ccf26c59a339f94f6918d695f28a5eb5b62
Add support for Python 3 requirements

This patch adds the ability to handle requirements-py3.txt and
test-requirements-py3.txt as usual.

Change-Id: Ibff0bbd182cf1027f8a3ef2278d1d226538f8222
Update python-openstacksdk from the global-requirements file

Change-Id: If05ef816e1a2b9423cfc7f0544ee922a12805a9c
Unpin kazoo

There doesn't seem to be a reason to pin to a
year old version of kazoo since other projects
would like to use the newer version its safer
just to unpin the version restriction.

Change-Id: I7c5a74e06f604ce89f0de0a4b01a8f7be41d70a2
Update python-keystoneclient to 0.5.0

A new version of keystoneclient was released containing changes we
wish to use in Heat, so bump to the latest version.

Change-Id: I62fe2363e97df9a8825c91ba67a1d86c927eaf22
Depending on python-swiftclient>=1.6

Now we're depending on python-swiftclient>=1.6 since the parameter
'headers' was introduced since python-swiftclient 1.6. This is a
regression issue introduced by patch:
https://review.openstack.org/#/c/48913/

get_object(container, obj, resp_chunk_size=None, query_string=None,
response_dict=None, headers=None)

Here is the commit of adding param 'headers' for Swift client, see:
https://github.com/openstack/python-swiftclient/commit/d34f12614820416aebe5e91eab9726b556d1f973

Closes-Bug: #1276033

Change-Id: Ibebf1d1ac8df9f35a7d5b5745eddfcdb00a036df
pbr: update to 0.6

0.6 version adds support for multiple requirement file based on the
major Python version used. This is needed to add support for Python 3 on
some projects like oslo-incubator.

Change-Id: I868bbba20f40dbd8d57d3045921c0c566d311da6
Sort tracked projects list

Change-Id: I1e27aa2708abe0ef952af1893e52c3f6f45b7b8c
Add rally to tracked projects list

Change-Id: Ibd1beeda70df0f3d1020bf3a46d1fc9a44226818
Merge "Depending on python-swiftclient>=1.6"
Merge "Sort tracked projects list"
Merge "Add rally to tracked projects list"
Merge "Update python-openstacksdk from the global-requirements file"
Merge "pbr: update to 0.6"
Merge "Add support for Python 3 requirements"
Merge "Unpin kazoo"
Merge "Add XenAPI to OpenStack dependencies"
Merge "Update python-keystoneclient to 0.5.0"