Get rid of rally.benchmark.tests module

This patch gets rid of the rally.benchmark.tests module, which contained just
the lists of benchmark scenarios and verification tests. Both were moved to
the test engine class as its instance variables.

Blueprint test-engine

Change-Id: I5044ab69db4d3724fcc8319c931f3aac82525778
Added python clients patches

Moved nova patches to corresponding folder

Change-Id: I97ea96b720460d3c28875bc0637aa5dfd00bcac6
Merge "Added python clients patches"
Merge "Get rid of rally.benchmark.tests module"