CircleCI: directly use install solc script to dodge pipenv api changes

.circleci/config.yml

@@ -49,7 +49,7 @@ jobs:
             pipenv graph
       - run:
           name: Install Solidity Compiler
-          command: pipenv run install_solc
+          command: pipenv run ./scripts/install_solc.sh
       - persist_to_workspace:
           root: ~/.local/share/virtualenvs/
           paths:

tests/fixtures.py

@@ -190,7 +190,8 @@ def mining_ursulas(three_agents):
 
     _ursulas = make_ursulas(ether_addresses=ursula_addresses,
                             miner_agent=miner_agent,
-                            miners=True)
+                            miners=True,
+                            ursula_starting_port=starting_point)
     try:
         yield _ursulas
     finally:
@@ -217,6 +218,7 @@ def non_ursula_miners(three_agents):
     _ursulas = make_ursulas(ether_addresses=ursula_addresses,
                             miner_agent=miner_agent,
                             miners=True,
+                            ursula_starting_port=starting_point,
                             bare=True)
     try:
         yield _ursulas