+ Agent loss timeout is now confugarable for scale tests
+ Time for each test is also configurable
+ Check if directory passed is valid in graphing
+ Fix to shaker_build.yml to source the venv correctly
Change-Id: I4b45f8bedcbf579604469468dada84456d6516a9
Signed-off-by: Sindhur <smalleni@redhat.com>