BVS-1981 test path integration with horizon

Reviewer: @kevinbenton  @kjiang 
CC @kyleforster  
tables are created in neutron db.
rest client is nsapp rest/rest_lib
all configuration is hardcoded at const.py 
I suggest collapsing all of this into a single args dict like I suggested in the other handle method so it doesn't feel like repeating parameters so much.