Remove broken package "pywbem"

This pacakge is causing system breakage due to a new version being
released that is otherwise incompatible with requirements as found
within OpenStack. After reviewing the package usage and the reason
it's been included but the only thing I could find that actually
uses this resource was cinder and only when using the EMC VMAX
driver: http://paste.openstack.org/show/491185/ -- being that this
package is not even listed in global requirements and is not in
support of anything we could say is a common backend within Cinder
that we know we're currently supporting I am of the opinion that
this package should be removed.

Depends-On: I152fa0130e64ad5756b413ed8f9714d28e75d0bb
Depends-On: I6c7ad22df1c788ff05bec00cfea8f3d8fa47b679
Change-Id: I7b8cf72032433deaa5db0647eacc075dd597c566
Signed-off-by: Kevin Carter <kevin.carter@rackspace.com>

global-requirement-pins.txt

@@ -1,3 +1,2 @@
 # This file was created to set pins that are needed but should not be
 #  installed as base requirements
-pywbem<0.8.0

playbooks/roles/os_cinder/defaults/main.yml

@@ -247,7 +247,6 @@ cinder_pip_packages:
   - pycrypto
   - python-cinderclient
   - python-keystoneclient
-  - pywbem
 
 # Service Names
 cinder_service_names:

playbooks/roles/os_swift/defaults/main.yml

@@ -201,7 +201,6 @@ swift_pip_packages:
   - python-keystoneclient
   - python-memcached
   - python-swiftclient
-  - pywbem
   - swift
 
 swift_apt_packages: