Downgraded required version of WebOb to 1.0.8.
Downgraded required version of WebOb to 1.0.8.

 * Maintaining version parity with other OpenStack projects is
   essential to packaging efforts and shared installation (devstack).
 * fixes bug 950374

Change-Id: I9b16f29a3641df7063ec80bc86b03b4857776b42

mestery/x-stackforge-odl,dougwig/x-neutron-vpnaas,CiscoSystems/networking-odl,gaolichuang/neutron-fwaas,gotostack/neutron-lbaas,schoksey/networking-odl,flavio-fernandes/networking-odl,openstack/networking-odl,CiscoSystems/networking-odl,gandelman-a/neutron-lbaas,openstack/neutron-vpnaas,dougwig/x-neutron-lbaas,flavio-fernandes/networking-odl,citrix-openstack-build/neutron-vpnaas,openstack/neutron-fwaas,gandelman-a/neutron-lbaas,openstack/networking-odl,FedericoRessi/networking-odl,openstack/neutron-vpnaas,openstack/networking-odl,gotostack/neutron-lbaas,gaolichuang/neutron-fwaas,citrix-openstack-build/neutron-fwaas,citrix-openstack-build/neutron-lbaas,FedericoRessi/networking-odl,schoksey/networking-odl,dougwig/x-neutron-fwaas,gandelman-a/neutron-lbaas,gotostack/neutron-lbaas,openstack/neutron-fwaas