Upgrades, remove keystone client from dependencies

Removed keystone client dependencies to prevent
errors, when fuel client and upgrade script use
different versions.

Also it helps to solve the problem with broken
script because keystone client uses pip as
dependencies.

Change-Id: I16b0a6ecfdc4b4b14eac4441d9f1dbc06fa0c13a
Closes-bug: #1346366
Merge "Upgrades, remove keystone client from dependencies"