Bump requirements in preparation for kilo
Bump requirements in preparation for kilo

This commit brings o-a-d's requirements.txt in line w/
global-requirements.txt (master).  Also, we remove any packages that
are no longer required (a number were installed previously for tools
in scripts/ which no longer exist).  Additionally, we add some comments
indicating what requires a specific package.

NOTE: wheel requirement was originally added as pip < 6.0 required
wheels package in order to be able to install wheels themselves.  Since
we also bump pip to 6.0, wheel is no longer required.

Change-Id: I0de858283157cfb22db935bfe81a7ec23c9a7b9c
Closes-Bug: #1428106

shane-c/openstack-ansible,mrda/openstack-ansible,stackforge/os-ansible-deployment,mancdaz/openstack-ansible,yanyao/openstack-deployment-liberty,yanyao/openstack-deployment-liberty,sigmavirus24/openstack-ansible,shane-c/openstack-ansible,achekunov/openstack-ansible,yanyao/openstack-deployment,git-harry/os-ansible-deployment,AlphaStaxLLC/os-ansible-deployment,Logan2211/openstack-ansible,sti-jans/openstack-ansible,miguelgrinberg/os-ansible-deployment,major/openstack-ansible,robb-romans/openstack-ansible,sti-jans/openstack-ansible,BjoernT/openstack-ansible,mrda/openstack-ansible,mancdaz/openstack-ansible,manuelfelipe/openstack-ansible,achekunov/openstack-ansible,yanyao/openstack-deployment-liberty,yanyao/openstack-deployment,AlphaStaxLLC/os-ansible-deployment,major/openstack-ansible,cfarquhar/openstack-ansible,major/os-ansible-deployment,dhanunjaya/os-ansible-deployment,weezer/openstack-ansible,sacharya/os-ansible-deployment,VaneCloud/openstack-ansible,yanyao/openstack-ansible,antonym/openstack-ansible,miguelgrinberg/os-ansible-deployment,wenhuizhang/os-ansible-deployment,BjoernT/os-ansible-deployment,yanyao/openstack-deployment,shane-c/openstack-ansible,achekunov/openstack-ansible,git-harry/os-ansible-deployment,mrda/openstack-ansible,open-switch/infra_openstack-ansible,sigmavirus24/os-ansible-deployment,cloudnull/os-ansible-deployment,BjoernT/os-ansible-deployment,git-harry/os-ansible-deployment,AlphaStaxLLC/os-ansible-deployment,cloudnull/os-ansible-deployment,VaneCloud/openstack-ansible,open-switch/infra_openstack-ansible,robb-romans/openstack-ansible,weezer/openstack-ansible,jpmontez/openstack-ansible,BjoernT/openstack-ansible,antonym/openstack-ansible,jpmontez/os-ansible-deployment,open-switch/infra_openstack-ansible,metral/os-ansible-deployment,pombredanne/os-ansible-deployment,sti-jans/openstack-ansible,yanyao/openstack-ansible,manuelfelipe/openstack-ansible,openstack/openstack-ansible,Logan2211/openstack-ansible,sigmavirus24/openstack-ansible,wenhuizhang/os-ansible-deployment,antonym/openstack-ansible,yanyao/newton,jpmontez/openstack-ansible,jpmontez/os-ansible-deployment,cfarquhar/openstack-ansible,pombredanne/os-ansible-deployment,d34dh0r53/os-ansible-deployment,openstack/openstack-ansible,major/os-ansible-deployment,d34dh0r53/os-ansible-deployment,sigmavirus24/os-ansible-deployment,yanyao/newton,manuelfelipe/openstack-ansible,os-cloud/os-ansible-deployment,stackforge/os-ansible-deployment,metral/os-ansible-deployment,jpmontez/os-ansible-deployment,yanyao/openstack-deployment,jpmontez/openstack-ansible,VaneCloud/openstack-ansible,os-cloud/os-ansible-deployment,bunchc/openstack-ansible,bunchc/openstack-ansible,sacharya/os-ansible-deployment,pombredanne/os-ansible-deployment,dhanunjaya/os-ansible-deployment,BjoernT/os-ansible-deployment