Disable volume AZ select for snapshot source

Conflicts:
	openstack_dashboard/dashboards/project/volumes/forms.py

Change-Id: Ia53f1def7669a0368935e542646e4505d1091891
(cherry picked from commit 0e1117c144071622092a30526b690b7c740439cb)
Add .py to MANIFEST.in to work around build issues

Change-Id: I647fe64aef4f06c6e199f080a2a7ec0aac63c0ae
Remove docs for removed can_encrypt_volumes setting

Change I730b4ffc26f391065943cb0d135ceac113cb6754 removed
support for encrypted volumes, but didn't remove the docs.

Change-Id: I29854e9d0abcccbfe3949797908016780b47ff6c
Closes-bug: #1250711
(cherry picked from commit 81f7c7077c176db251b6725ec225f666049b49e2)
Add option to disable server password fields

Not many hypervisors support setting a server admin password via Nova.
This change adds an item to OPENSTACK_HYPERVISOR_FEATURES called
'can_set_password' that controls whether password settings fields
are displayed in the UI.

Change-Id: I03399c171b2b7cbf756292cee283419d6235461f
Closes-bug: #1250713
(cherry picked from commit e4288adbf1d0cec5067ee9a7db816b8cbda43f85)